class _Buttons extends StatelessWidget { const _Buttons({ Key key, }) : super(key: key); @override Widget build(BuildContext context) { return Container( child: Row( mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [ const _Button(icon: Icons.call, text: 'CALL'), const _Button(...
appBar: AppBar( title: Text('Flutter layout demo'), ), body: ListView( children: [ const _Header(), const _SubHeader(), const _Buttons(), const _Description(), ], ), ); } } class _Header extends StatelessWidget { const _Header({ Key key, }) : super(key: key); @override Wi...
App开发中比较常用的一个场景是:点击一个按钮button,设置button.setEnabled(false),然后发送一个请求,请求成功返回或失败时将按钮恢复为可以点击的状态:button.setEnabled(true)。 那么在flutter中能实现一样的效果吗? 参考:https://stackoverflow.com/questions/49351648/how-do-i-disable-a-button-in-flutter 先看...
Key key,this.appBar,//标题栏this.body,//内容this.floatingActionButton,//悬浮按钮this.persistentFooterButtons,//底部持久化现实按钮this.drawer,//侧滑菜单左this.endDrawer,//侧滑菜单右this.bottomNavigationBar,//底部导航this.backgroundColor,//背景颜色this.resizeToAvoidBottomPadding:true,//自动适应底部p...
removeTopPadding: widget.appBar !=null, removeRightPadding:false, removeBottomPadding: widget.bottomNavigationBar !=null|| widget.persistentFooterButtons !=null, removeBottomInset: _resizeToAvoidBottomInset, );// 1.模态框if(_showBodyScrim) { ...
mainAxisSize: MainAxisSize.min, children: <Widget>[ const RaisedButton( onPressed: null, child: Text( 'Disabled Button', style: TextStyle(fontSize: 20) ), ), const SizedBox(height: 30), RaisedButton( onPressed: () {}, child: const Text( ...
The following is a class for making draggable floating operation buttons. It has several arguments, including sub, initialOffset, and onPressed. The child widgets are delivered using positioning widgets that depend on the current offset. In addition, it is also packaged as a sub-component of the...
在我们定义一个主题后,我们可以在自己的部件中使用它。另外,Flutter提供的Material Widgets将使用我们的主题为AppBars,Buttons,Checkboxes等设置背景颜色和字体样式。 创建应用主题 为了在整个应用程序中共享包含颜色和字体样式的主题,我们可以将ThemeData提供给MaterialApp构造函数。
If true, and bottomNavigationBar or persistentFooterButtons is specified, then the body extends to the bottom of the Scaffold, instead of only extending to the top of the bottomNavigationBar or the persistentFooterButtons. final extendBodyBehindAppBar → bool ...
appBar- 显示在界面顶部的一个 AppBar。 body- 当前界面所显示的主要内容 Widget。 floatingActionButton- Material 设计中所定义的 FAB,界面的主要功能按钮。 persistentFooterButtons- 固定在下方显示的按钮,比如对话框下方的确定、取消按钮。 drawer- 抽屉菜单控件。