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手电筒使用指导 · App Inventor 2 中文网
...会弹出错误提示。
快速上手
when 按钮1.Click() {
手电筒1.Toggle()
}
点一下开灯，再点一下关灯。
案例一：带状态的开关按钮
按钮文字随状态变化，打开 App 时显示正确状态：
when Screen1.Initi...
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from the_table
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from (
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