Widgetbuild(BuildContext context){returnnewScaffold(//...floatingActionButton:newFloatingActionButton(onPressed:(){//4.floattingbuttonprint('FloatingActionButton onPressed context hashcode = ${context.hashCode}');_incrementCounter();},tooltip:'Increment',child:newIcon(Icons.add),),// This trailing ...
center, children: <Widget>[ Text( 'You have pushed the button this many times:', ), Text( '$_counter', style: Theme.of(context).textTheme.headline4, ), ], ), ), floatingActionButton: FloatingActionButton( onPressed: _incrementCounter, tooltip: 'Increment', child: Icon(Icons.add), ...
Widgetbuild(BuildContext context){varbutton=FloatingActionButton(onPressed:increment,tooltip:'Increment',child:Icon(Icons.add),);returnbutton;}} 是不是感觉非常麻烦呢? 如何处理这种情况,能让需要的参数不这么跋山涉水? 2.第一个解决方案:InheritedWidget 这里我们使用一个InheritedWidget来提供数据和方法,让她们...
'You have pushed the button this many times:', ), Observer( builder: (_) => Text( '${_counter.value}', style: const TextStyle(fontSize: 20), )), ], ), ), floatingActionButton: FloatingActionButton( onPressed: _counter.increment, tooltip: 'Increment', child: const Icon(Icons.add)...
'You have pushed the button this many times:', ), Text( '$_counter', style: Theme.of(context).textTheme.headline4, ), ], ), ), floatingActionButton: FloatingActionButton( onPressed: _incrementCounter, tooltip: 'Increment', child: Icon(Icons.add), ...
child: Icon(Icons.add), ); }, ), ), ), ); } } Fish-Redux 一个针对Flutter优化的Redux版本,减少样板代码,同时保持架构概念。 https://pub.dev/packages/fish_redux GetIt 这是一个依赖管理工具,当然也能用来作为简单的状态管理,比如全局、局部的数据维护。
panorama), //公司logo applicationIcon: new FlutterLogo(), //app名称 applicationName: '凌川江雪', //app版本号 applicationVersion: 'V1.0.0', //版权信息 applicationLegalese: '版权归XX科技有限公司所有...', // child: ,//关于应用名 // aboutBoxChildren: <Widget>[],//更多信息 ), 运行效果...
iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="assets/images/baseline_west_white_24dp.png" style={style.backIcon}/>动态界面 Home ... )}export default Ho...
child:constIcon(Icons.add), ), ); } }classCountextendsStatelessWidget{constCount({ Key? key}) :super(key: key);@overrideWidget build(BuildContext context) {returnText(///Calls`context.watch`to make [Count] rebuild when [Counter] changes.'${context.watch<Counter>().count}', ...
floatingActionButton: FloatingActionButton(onPressed: _incrementCounter,tooltip: 'Increment',child: Icon(Icons.add),), // This trailing comma makes auto-formatting nicer for build methods.);} 使用到shared_preferences本地存储的代码都有备注,这里就不在过多赘述了,本段代码实现的效果如首图所示,shared_...