如何在Flutter中通过不同的子节点传递文本字段中的数据？

// 父节点
class ParentWidget extends StatefulWidget {
  @override
  _ParentWidgetState createState() => _ParentWidgetState();
}

class _ParentWidgetState extends State<ParentWidget> {
  String _data = 'Hello';

  void _updateData(String newData) {
    setState(() {
      _data = newData;
    });
  }

  @override
  Widget build(BuildContext context) {
    return ChildWidget(
      data: _data,
      updateData: _updateData,
    );
  }
}

// 子节点
class ChildWidget extends StatelessWidget {
  final String data;
  final Function(String) updateData;

  ChildWidget({required this.data, required this.updateData});

  @override
  Widget build(BuildContext context) {
    return Column(
      children: [
        Text(data),
        ElevatedButton(
          onPressed: () => updateData('World'),
          child: Text('Update Data'),
        ),
      ],
    );
  }
}

// 定义数据模型
class DataModel extends ChangeNotifier {
  String _data = 'Hello';

  String get data => _data;

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

// 父节点
class ParentWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ChangeNotifierProvider(
      create: (_) => DataModel(),
      child: ChildWidget(),
    );
  }
}

// 子节点
class ChildWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final dataModel = Provider.of<DataModel>(context);
    return Column(
      children: [
        Text(dataModel.data),
        ElevatedButton(
          onPressed: () => dataModel.updateData('World'),
          child: Text('Update Data'),
        ),
      ],
    );
  }
}