flutter - Open drawer on clicking AppBar

Question

If you create an Scafold there is an option for drawer. If you now create this drawer you get automaticly the menu icon on the leading position of the appbar. But i want an other icon there which opens the drawer. I tried to make an iconbutton myself on the leading position but this button can‘t open the drawer even with ?Scafold.of(context).openDrawer()“ it can‘t open it.

Is there any option to replace the icon for the drawer button?

question from:https://stackoverflow.com/questions/47435231/open-drawer-on-clicking-appbar

Answer 1

Use a Key in your Scaffold and show the drawer by calling myKey.currentState.openDrawer(), here is a working code:

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(),
        ),
      ),
    );
  }
}