flutter RaisedButton点击改变自身颜色 仅做记录

flutter RaisedButton点击改变自身颜色 仅做记录

将按钮的 color 设置一个变量 点击以后改变变量的值

class ThemeColors {///纯黑色static Color colorBlack = Color.fromARGB(255, 0, 0, 0);
}

class SwitchDemo extends StatefulWidget {@overrideState<StatefulWidget> createState() => FirstScreen();
}
class FirstScreen extends State<SwitchDemo> {bool check = true;@overrideWidget build(BuildContext context) {return  Scaffold(appBar:  AppBar(title:  Text('First Screen'),),body:  Column(children: <Widget>[Container(child: Center(child: Container(child: GestureDetector(child: new Text('hello',style: new TextStyle(color: Colors.white,fontSize: 24.0,fontWeight: FontWeight.w900,)),onTap: () {Navigator.of(context).pushNamed('/demo');},),decoration:  BoxDecoration(image:  DecorationImage(image:AssetImage('assets/1.jpg'),),),width: 400,height: 200,),),width: 400,color: d,),RaisedButton(child: Text(' 返回 ',style: new TextStyle(color: Colors.white,fontSize: 24.0,fontWeight: FontWeight.w900,)),color: lorBlack, // 颜色设置为变量onPressed:() {setState(() {if (check) { // 通过判断check 来 改变按钮颜色Navigator.of(context).pushNamed('/Platform');lorBlack = Color.fromARGB(255, 0, 0, 0); } else {lorBlack = Color.fromARGB(255, 226, 36, 0);}});},),Switch(value: check,activeColor: d,activeTrackColor: Colors.blue,inactiveThumbColor: ,inactiveTrackColor: ange,    // 激活时原点颜色materialTapTargetSize: MaterialTapTargetSize.padded,onChanged: (bool val) {setState(() {check = !check;if (check) {print(check);}});},)],),);}
}