Flutter -如何创建带有持久按钮的底部侧边栏来打开和关闭它

import 'package:flutter/material.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool _isSidebarOpen = false;

  void _toggleSidebar() {
    setState(() {
      _isSidebarOpen = !_isSidebarOpen;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My App'),
      ),
      body: Container(
        // 应用程序主体内容
      ),
      bottomNavigationBar: BottomAppBar(
        child: Row(
          children: [
            IconButton(
              icon: Icon(Icons.menu),
              onPressed: _toggleSidebar,
            ),
            // 其他底部导航按钮
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        child: Icon(Icons.add),
        onPressed: () {
          // 浮动操作按钮的点击事件
        },
      ),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
      drawer: _isSidebarOpen ? Drawer(
        child: ListView(
          children: [
            // 侧边栏内容
          ],
        ),
      ) : null,
    );
  }
}

void main() {
  runApp(MyApp());
}

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