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檢查核取方塊是否被按下
Checkbox已被勾選
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"Control_Checkbox_isChecked\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkbox</field></block></value></block></xml>"}
這積木是用作檢查核取方塊是否已經被按下。
參數：螢幕項目（輸入控制）
輸出： 布林值（True/False）
示例代碼：
你結合while-循環和if-else條件式來顯示結果。
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><block type=\"controls_if\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow><block type=\"Control_Checkbox_isChecked\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkBox</field></block></value></block></value><statement name=\"DO0\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkChecked</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">It is clicked.</field></shadow></value></block></statement><statement name=\"ELSE\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkChecked</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">It isn't clicked.</field></shadow></value></block></statement></block></xml>"}
{"blocks":"<xml xmlns=\"https://developers.google.com/blockly/xml\"><variables><variable>mainLayout</variable><variable>mainScreen</variable><variable>checkBox</variable><variable>checkChecked</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\">checkBox</field><value name=\"VALUE\"><shadow type=\"math_number\"><field name=\"NUM\">0</field></shadow><block type=\"Control_createCheckbox\"/></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\">checkBox</field></block></value><next><block type=\"variables_set\"><field name=\"VAR\">checkChecked</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\">checkChecked</field></block></value><next><block type=\"device_while\"><value name=\"COND\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow></value><statement name=\"DO\"><block type=\"controls_if\"><mutation else=\"1\"/><value name=\"IF0\"><shadow type=\"logic_boolean\"><field name=\"BOOL\">TRUE</field></shadow><block type=\"Control_Checkbox_isChecked\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkBox</field></block></value></block></value><statement name=\"DO0\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkChecked</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">It is clicked.</field></shadow></value></block></statement><statement name=\"ELSE\"><block type=\"Control_TextBlock_setContent\"><value name=\"this\"><block type=\"variables_get\"><field name=\"VAR\">checkChecked</field></block></value><value name=\"content\"><shadow type=\"text\"><field name=\"TEXT\">It isn't clicked.</field></shadow></value></block></statement><next><block type=\"Task_sleep\"><value name=\"ms\"><shadow type=\"math_number\"><field name=\"NUM\">500</field></shadow></value></block></next></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>"}
注意：你必須在while(true)循環使用「暫停 毫秒」積木。否則它會無限循環，這個Web App會崩潰。
當核取沒有被按下時的輸出結果：
當核取被按下時的輸出結果：
