Flutter:将变量保存在类中，以便在不同的小部件中显示它

class MyWidget extends StatelessWidget {
  final String myVariable;

  MyWidget({required this.myVariable});

  @override
  Widget build(BuildContext context) {
    return Text(myVariable);
  }
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    String myVariable = 'Hello, Flutter!';
    return MaterialApp(
      home: Scaffold(
        body: Column(
          children: [
            MyWidget(myVariable: myVariable),
            Text('Other widget'),
          ],
        ),
      ),
    );
  }
}