OpenDrawerofcurrent(topmost)route'sScaffold

打开当前（顶部）路由的抽屉，可以通过以下代码实现：

Scaffold.of(context).openDrawer();

完整示例代码如下：

import 'package:flutter/material.dart';

class MyHomePage extends StatelessWidget { @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: Text('Home'), ), body: Center( child: RaisedButton( onPressed: () { Scaffold.of(context).openDrawer(); }, child: Text('Open Drawer'), ), ), drawer: Drawer( child: ListView( children: [ UserAccountsDrawerHeader( accountName: Text('Flutter'), accountEmail: Text('flutter@example.com'), ), ListTile( leading: Icon(Icons.home), title: Text('Home'), onTap: () { Navigator.pop(context); }, ), ListTile( leading: Icon(Icons.settings), title: Text('Settings'), onTap: () { Navigator.pop(context); }, ), ], ), ), ); } }