使用Provider从第二个屏幕更新Scaffold

dependencies:
  flutter:
    sdk: flutter
  provider: ^5.0.0

import 'package:provider/provider.dart';

import 'package:flutter/material.dart';

class MyProvider extends ChangeNotifier {
  bool _isScaffoldVisible = false;

  bool get isScaffoldVisible => _isScaffoldVisible;

  void updateScaffoldVisibility(bool isVisible) {
    _isScaffoldVisible = isVisible;
    notifyListeners();
  }
}

Widget build(BuildContext context) {
  MyProvider myProvider = Provider.of<MyProvider>(context);
  bool isScaffoldVisible = myProvider.isScaffoldVisible;

  return Scaffold(
    appBar: AppBar(
      title: Text('Second Screen'),
    ),
    body: Center(
      child: ElevatedButton(
        onPressed: () {
          myProvider.updateScaffoldVisibility(!isScaffoldVisible);
        },
        child: Text('Toggle Scaffold'),
      ),
    ),
    drawer: isScaffoldVisible ? Drawer() : null,
  );
}

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