如何在Flutter中设置Scaffold内部的Provider值

dependencies:
  flutter:
    sdk: flutter
  provider: ^4.3.2+3

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';

class MyData {
  int value = 0;
}

void main() {
  runApp(
    ChangeNotifierProvider(
      create: (_) => MyData(),
      child: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'My App',
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final myData = Provider.of<MyData>(context);

    return Scaffold(
      appBar: AppBar(
        title: Text('My App'),
      ),
      body: Center(
        child: Text(
          'Value: ${myData.value}',
          style: TextStyle(fontSize: 24),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          myData.value += 1;
        },
        child: Icon(Icons.add),
      ),
    );
  }
}