如何在多个小部件中使用同一块

class MyDataModel extends ChangeNotifier {
  String sharedData = "Shared Data";

  void updateData(String newData) {
    sharedData = newData;
    notifyListeners();
  }
}

class MyApp extends StatelessWidget {
  final MyDataModel dataModel = MyDataModel();

  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (_) => dataModel,
      child: MaterialApp(
        // App content
      ),
    );
  }
}

class MyWidget1 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final dataModel = Provider.of<MyDataModel>(context);
    return Text(dataModel.sharedData);
  }
}

class MyWidget2 extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final dataModel = Provider.of<MyDataModel>(context);
    return ElevatedButton(
      onPressed: () {
        dataModel.updateData("New Shared Data");
      },
      child: Text('Update Data'),
    );
  }
}