该文件提供了有关如何与各种档案类型进行互动的指南，包括检查属性、加载内容以及操作图像和视频。

在档案内获取某些内容

检查不同的档案类型

档案获取类型

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_getType\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取档案的档类型。

参数： 档案
输出： 屏幕项（字符串）
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>_type</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">_type</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_getType\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"variables_get\"><field name=\"VAR\">_type</field></block></value></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

检查档名

档案获取名称

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_getName\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取档案的档案名。

参数： 档案
输出： 屏幕项（字符串）
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>name</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">name</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_getName\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"variables_get\"><field name=\"VAR\">name</field></block></value></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

检查档案大小

档案获取大小

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_getSize\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取档案的大小。

参数： 档案
输出： 屏幕项（字符串）
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>size</variable><variable>dateTimeOffset</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">size</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_getSize\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">size</field></block></value></block></value></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

在档案内加载视频

档案到视频

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取文件的视频剪辑。 （接受的文件类型：MP4、M4A）

参数： 档案
输出： 视频
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>video</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_VideoContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

在档案内加载图像

档案到图像

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_toImage\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取档案的图像。 （接受的档案类型：JPEG、PNG、GIF和BMP等）

参数： 档案
输出： 图像
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>video</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toImage\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

在档案内载入文字

档案转文本

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_toText\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于获取档的文字。 （接受档案类型：txt）

参数： 档
输出： 字符串
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>file</variable><variable>text</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">text</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toText\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><block type=\"variables_get\"><field name=\"VAR\">text</field></block></value></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

图像

更改图像方向

图像按度旋转

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_ImageContainer_rotate\"><field name=\"direction\">RotationDirection.Clockwise</field><field name=\"degree\">RotationDegree.Ninety</field><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">image</field></block></value></block></xml>"}

这用于更改图像的方向。

参数：

• 图像
• 条件：
  • 顺时针（预设）/逆时针
  • 90（预设）/180

输出： 图像
范例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>fileInput</variable><variable>getFilesButton</variable><variable>gettingFiles</variable><variable>image</variable></variables><block type=\"pxt-on-start\" x=\"0\" y=\"0\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">image</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toImage\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"File_ImageContainer_rotate\"><field name=\"direction\">RotationDirection.Clockwise</field><field name=\"degree\">RotationDegree.Ninety</field><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">image</field></block></value></block></value></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

视频

从视频中捕获图像

视频捕捉图像

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_VideoContainer_captureImage\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></xml>"}

这用于捕获视频中的图像。

参数： 视频
输出： 图像
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></next></block></statement><next><block type=\"variables_set\"><field name=\"VAR\">captureImageButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Capture image</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">captureImageButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">captureImageButton</field></block></value><statement name=\"HANDLER\"><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"File_VideoContainer_captureImage\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

选择文件后，单击“获取文件”和“捕获图像”，输出：

静音视频

视频静音

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_FileContainer_getType\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value></block></xml>"}

这用于允许视频有声音或没有声音。

参数：

• 视频
• 条件：false（预设）/true

输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setMuted\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"muted\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

选择文件并单击“获取文件”后，输出：

检查视频是否静音

视频已静音

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_setMuted\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"muted\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value></block></xml>"}

这用于允许视频有声音或没有声音。

参数： 视频
输出： 布尔值 （True/False）
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setMuted\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"muted\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"File_VideoContainer_captureImage\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value><next><block type=\"controls_if\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow><block type=\"File_MediaContainer_isMuted\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value><statement name=\"DO0\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">The video is muted.</field></shadow></value></block></statement><statement name=\"ELSE\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">The video is not muted.</field></shadow></value></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

当视频静音时，输出：

当视频未静音时，输出：

更改视频的音量

视频设置音量

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_setVolume\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"volume\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}

这用于设置视频的音量是否有声音。

参数：

• 视频
• 条件：0（默认）/1

输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setVolume\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"volume\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

当它设置为 0 时，它应该没有声音;当它设置为 1 时，它应该有声音。

输出：

显示视频音量

视频获取音量

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_getVolume\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value></block></xml>"}

这用于获取视频的音量数。

参数： 视频
输出： 数
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setVolume\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"volume\"><shadow type=\"math_number\"><field name=\"NUM\">1</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">videoVolume</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_MediaContainer_getVolume\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\"/></shadow><block type=\"DateTime_DateTimeOffset_toString\"><value name=\"dateTimeOffset\"><block type=\"variables_get\"><field name=\"VAR\">videoVolume</field></block></value></block></value></block></value></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

输出：

在特定时间播放视频

视频设置播放时间

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_setPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value><value name=\"time\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></xml>"}

这用于允许视频跳到指定位置。

参数：

• 视频
• 条件：数字（默认值：0 秒）

输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"time\"><shadow type=\"math_number\"><field name=\"NUM\">5</field></shadow></value></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

当它在 5 秒后开始时，输出：

在视频中显示具体时间

视频以秒为单位获得播放时间

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_getPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value></block></xml>"}

这用于允许视频跳到指定位置。

参数： 视频
输出： 数
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"time\"><shadow type=\"math_number\"><field name=\"NUM\">5</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">playbackTime</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_MediaContainer_getPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\"/></shadow><block type=\"DateTime_Duration_toString\"><value name=\"duration\"><block type=\"variables_get\"><field name=\"VAR\">playbackTime</field></block></value></block></value><value name=\"isPreformatted\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value></block></value></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

单击“获取文件”后，输出：

以秒为单位显示视频的总时间

视频获取时长（以秒为单位）

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_getDuration\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value></block></xml>"}

这用于获取以秒为单位的总视频长度。

参数： 视频
输出： 数
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">check</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">check</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">gettingFiles</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">gettingFiles</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_setPlaybackTime\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><value name=\"time\"><shadow type=\"math_number\"><field name=\"NUM\">5</field></shadow></value><next><block type=\"variables_set\"><field name=\"VAR\">duration</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_MediaContainer_getDuration\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"Control_createTextBlock\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"1\" _input_init=\"true\"></mutation><value name=\"text\"><shadow type=\"text\"><field name=\"TEXT\"/></shadow><block type=\"DateTime_Duration_toString\"><value name=\"duration\"><block type=\"variables_get\"><field name=\"VAR\">duration</field></block></value></block></value><value name=\"isPreformatted\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value></block></value></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

单击“获取文件”后，输出：

停止视频

视频停止

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_stop\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value></block></xml>"}

这用于停止视频。 它与暂停不同，它将停止移动。

参数： 视频
输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">stopVideoButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Stop video</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">stopVideoButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></next></block></statement><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">stopVideoButton</field></block></value><statement name=\"HANDLER\"><block type=\"File_MediaContainer_stop\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

单击“获取文件”和“停止视频”后，输出：

暂停视频

视频暂停

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_pause\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">audioOrVideo</field></block></value></block></xml>"}

这用于暂时暂停视频。

参数： 视频
输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">pauseVideoButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Pause video</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">pauseVideoButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></next></block></statement><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">pauseVideoButton</field></block></value><statement name=\"HANDLER\"><block type=\"File_MediaContainer_pause\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

单击“获取文件”和“暂停视频”后，输出：

播放视频

视频播放

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></xml>"}

它用于播放视频。

参数： 视频
输出： N/A
示例代码：

{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"pxt-on-start\"><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">mainLayout</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"ScreenItem_createLayout\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">mainScreen</field><value name=\"VALUE\"><shadow xmlns=\"http://www.w3.org/1999/xhtml\" type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Screen_create\"><value name=\"label\"><shadow type=\"text\"><field name=\"TEXT\">Main</field></shadow></value><value name=\"layout\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">fileInput</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createFileInput\"><mutation xmlns=\"http://www.w3.org/1999/xhtml\" _expanded=\"0\" _input_init=\"false\"></mutation></block></value><next><block type=\"Control_FileInput_setMultiple\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><value name=\"isMultiple\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">FALSE</field></shadow></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">getFilesButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Get files</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">pauseVideoButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Pause video</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">pauseVideoButton</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">playVideoButton</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createButton\"><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">Play video</field></shadow></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">playVideoButton</field></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">getFilesButton</field></block></value><statement name=\"HANDLER\"><block type=\"variables_set\"><field name=\"VAR\">file</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_FileInput_getFiles\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">fileInput</field></block></value></block></value><next><block type=\"variables_set\"><field name=\"VAR\">video</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"File_FileContainer_toVideo\"><value name=\"this\"><block type=\"lists_index_get\"><value name=\"LIST\"><block type=\"variables_get\"><field name=\"VAR\">file</field></block></value><value name=\"INDEX\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow></value></block></value></block></value><next><block type=\"ScreenItem_Layout_add\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">mainLayout</field></block></value><value name=\"item\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value><next><block type=\"File_MediaContainer_play\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">video</field></block></value></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}

点击“播放视频”后，输出：