更改从外部类返回的抽屉小部件的抽屉图标

Question

我正在尝试更改Dart中抽屉小部件的图标和颜色。我已经找到了一些方法，但没有一种适用于我的场景。我的自定义抽屉小部件是从另一个类返回的，所以我不能更改应用程序栏所在的主类中的前导图标，否则它将取代我当前的抽屉。我不会显示所有的代码，因为我不认为这是必要的。如有任何帮助，我们将不胜感激。

我当前的抽屉和调用方法：

抽屉类别：

import 'package:flutter/material.dart';
import 'package:new_app/Users.dart';
import '../main.dart';
class MainDrawer extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Drawer(
child: Column(
children: <Widget>[
Container(
width: double.infinity,
padding: EdgeInsets.all(20),
color: Theme.of(context).primaryColor,
child: Center(
child: Column(
children: [
Container(

菜单类/主页：

import 'screens/drawer_main.dart';
class Home extends StatefulWidget {
@override
_HomeState createState() => _HomeState();
}
class _HomeState extends State<Home> {
@override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
return new Future(() => false);
},
child: Scaffold(
backgroundColor: Colors.blueGrey[900],
appBar: AppBar(
//backgroundColor: Colors.blueGrey[900],
backgroundColor: Colors.transparent,
automaticallyImplyLeading: true,
title: Text(
"Home Page",
style: TextStyle(color: Colors.white),
),
actions: <Widget>[
//Profile Pic
IconButton(
icon: Icon(Icons.circle, color: Colors.white),
tooltip: 'Comment Icon',
onPressed: () {},
),
MainPopUp(), //IconButton
],
//IconButton
brightness: Brightness.dark,
),
//Current Method of Calling the Drawer: 
drawer: MainDrawer(),
body: Center(

Answer 1

在应用程序栏中添加前导属性，然后以编程方式调用Drawer Widget。

Scaffold(
backgroundColor: Colors.blueGrey[900],
appBar: AppBar(
//backgroundColor: Colors.blueGrey[900],
leading: Builder(
builder: (context) => IconButton(
icon: Icon(Icons.menu_rounded),
onPressed: () => Scaffold.of(context).openDrawer(),
),
),
backgroundColor: Colors.transparent,
automaticallyImplyLeading: true,
title: Text(
"Home Page",
style: TextStyle(color: Colors.white),
),
actions: <Widget>[
//Profile Pic
IconButton(
icon: Icon(Icons.circle, color: Colors.white),
tooltip: 'Comment Icon',
onPressed: () {},
),
MainPopUp(), //IconButton
],
//IconButton
brightness: Brightness.dark,
),
//Current Method of Calling the Drawer: 
drawer: MainDrawer(),

Answer 2

在AppBar()内部添加一个前导，并用程序打开抽屉。

AppBar(
leading: InkWell(
child: Icon(
//your preferred icon
Icons.camera
),
onTap: () {
Scaffold.of(context).openDrawer();
},
),
)