flutter drawer 自定义图标 icon 手动打开drawer

方法1：GlobalKey

import "package:flutter/material.dart";

class Test extends StatefulWidget {

  @override

  _TestState createState() => new _TestState();

}

class _TestState extends State<Test> {

  final GlobalKey<ScaffoldState> _scaffoldKey = new GlobalKey<ScaffoldState>();

  @override

  Widget build(BuildContext context) {

    return new Scaffold(

      key: _scaffoldKey,

      drawer: new Drawer(),

      appBar: new AppBar(

        leading: new IconButton(

            icon: new Icon(Icons.settings),

            onPressed: () => _scaffoldKey.currentState.openDrawer()),

      ),

    );

  }

}

方法2：builder

class _TestState extends State<Test> {

  @override

  Widget build(BuildContext context) {

    return new Scaffold(

      drawer: new Drawer(),

      appBar: new AppBar(

        leading: Builder(

          builder: (context) => IconButton(

                icon: new Icon(Icons.settings),

                onPressed: () => Scaffold.of(context).openDrawer(),

              ),

        ),

      ),

    );

  }

}

flutter drawer 自定义图标 icon 手动打开drawer的相关教程结束。