class RoutePageWithValue extends StatelessWidget { final String lastPageName;

BuildContext context;

RoutePageWithValue(this.lastPageName);

_showDialog() { showDialog( context: context, child: new AlertDialog(content: new Text('退出当前界面'), actions: [ new FlatButton( onPressed: () { Navigator.pop(context); Navigator.of(context).pop(); }, child: new Text('确定')) ]), ); }

Future _requestPop() { _showDialog(); return new Future.value(false); }

@override Widget build(BuildContext context) { this.context = context; //监听左上角返回和实体返回 return new WillPopScope( child: new Scaffold( appBar: new AppBar( title: new Text('RoutePageWithValue'), centerTitle: true, ), body: new Center( child: new Text('$lastPageName'), )), onWillPop: _requestPop); } }