Flutter - Is there a way to use just IconButton (without creating an app bar) to open the drawer?

问题

I'm trying to use the IconButton that can open the drawer on my app page, so when I tap the icon button, I expect to see the drawer. I've been looking up a way to do so online, but seemed like there're only two solutions: I can either use the appbar to put the IconButton in, or I can try the floating action button. But they're not what I'm looking for, I want just the IconButton to open the drawer. Is it possible do it?

回答1:

Yes, you can easily open the drawer through IconButton without using appBar. You need to use Key like I had used _scaffoldKey and use _scaffoldKey.currentState.openDrawer() method to open the drawer in IconButton widget.

class HomeState extends StatelessWidget {

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

 @override
Widget build(BuildContext context) {

return Scaffold(
  key: _scaffoldKey,
         drawer: Drawer(
      child: ListView(
        children: <Widget>[
          ListTile(
            title: Text("Ttem 1"),
            trailing: Icon(Icons.arrow_forward),
          ),
          ListTile(
            title: Text("Item 2"),
            trailing: Icon(Icons.arrow_forward),
          ),
        ],
      ),
    ),
        body: ListView(
         children:[

    Container(
              margin: EdgeInsets.only(left: 15.0,top:100.0),
              child: IconButton(
                icon: Icon(Icons.menu),
                onPressed: () {
                  _scaffoldKey.currentState.openDrawer();
                },

              ),
            ),
            ]
        ),
            );}


   }

来源：https://stackoverflow.com/questions/55697939/flutter-is-there-a-way-to-use-just-iconbutton-without-creating-an-app-bar-to