文档
设定元素内的焦点
InputControl成为焦点
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"Control_InputControl_focus\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">inputControl</field></block></value></block></xml>"}
这积木是用作设定文字区域内焦点。当它成为焦点，你可以在文字区域输入。
参数：萤幕项目（输入控制）
输出：N/A
示例代码：
这里设定按钮，用作检查变数是否成为焦点。
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">createButton</field></block></value><statement name=\"HANDLER\"><block type=\"Control_InputControl_focus\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">inputControl</field></block></value></block></statement></block></xml>"}
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>inputControl</variable><variable>createButton</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\">inputControl</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createTextArea\"/></value><next><block type=\"variables_set\"><field name=\"VAR\">createButton</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\">Click me to see focus</field></shadow></value></block></value><next><block type=\"ScreenItem_ScreenItem_onClick\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">createButton</field></block></value><statement name=\"HANDLER\"><block type=\"Control_InputControl_focus\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">inputControl</field></block></value></block></statement><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\">inputControl</field></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\">createButton</field></block></value></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
当方框没成为焦点时的输出结果：
当按下按钮，并看到焦点时的输出结果：
