其实如果只是要让按钮不响应事件,有很多种方法:你可以用变量控制你的逻辑;可以设置 onPressed 为 null;可以用AbsorbPointer 禁用事件... 而在flutter中,button类型没有类似disable的属性,按钮不可点击时需要设置: onPressed:null 是不是第一次见这种判断方法
一个Icon 是 x(关闭)的IconButton,点击会调用 Navigator.maybePop 返回上一个路由 ,默认长按提示是 back ,且不可去掉 RaisdButton 凸起的按钮,其实就是Android中的Material Design风格的Button ,继承自MaterialButton RawMaterialButton 不适用当前Theme或者ButtonTheme的控件 , 如果自定义,官方推荐使用这个 PopupMenuB...
I am trying to make this button active and inactive but i am able to do this with my code which is this container which i have called with the GridView() once i tap to these container it is selected but when i scroll upward or downward after selecting to these container become unselecte...
BackButton是一个material风格的返回按钮,本身是一个IconButton,点击时默认执行Navigator.maybePop即如果路由栈有上一页则返回到上一页。 BackButton(color: Colors.orange), 1. CloseButton CloseButton是一个material风格的关闭按钮,本身是一个IconButton,点击时默认执行Navigator.maybePop即如果路由栈有上一页则返回到...
Flutter是一种跨平台的移动应用开发框架,它可以帮助开发者使用单一代码库构建高性能、美观的移动应用程序。在动画运行时禁用所有单击事件是一种常见的需求,可以通过以下步骤实现: 1. 导入所需的库:...
I have issue to disable the button in its own function when app start button is enable and _enable1=true when I click on it and it should be disable it self but its not working for me here is my code that i have tried if(_enable1) { resendbutoonfunction=() { print("hello");...
RaisedButton(onPressed:=>debugDumpRenderTree,child: Text("Create render tree dump")) 程序运行后,单击这个按钮,观察控制台输出 (节选): I/flutter ( 7255): RenderView#7e860I/flutter ( 7255): │ debug mode enabled - androidI/flutter ( 7255): │ window size: Size(1080.0, 2094.0) (inphysical...
If the onPressed callback is null, Flutter treat the button as no action hence showing the button in a disabled state.If the onPressed is there, Flutter shows the button in an enabled state.Here is an example of buttons in an enable and a disable state....
在开发过程中，取消需求是很常见的，但很容易被忽略。然而，取消需求的好处也很大。例如，在页面中会...
StringgetpasteButtonLabel =>"粘贴"; @override StringgetselectAllButtonLabel =>"全选"; @override DatePickerDateOrdergetdatePickerDateOrder => DatePickerDateOrder.ymd; @override DatePickerDateTimeOrdergetdatePickerDateTimeOrder => DatePickerDateTimeOrder.date_time_dayPeriod; ...