Dart Flutter Drawer Widget 更改 Scaffold.body 内容

您只需与Drawer个项目交互即可更改感兴趣内容的state个，如下所示:

个

以下是本例的相关代码:

class TestPage extends StatefulWidget {
  @override
  _TestPageState createState() => new _TestPageState();
}

class _TestPageState extends State<TestPage> {
  String text = "Initial Text";
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
        drawer: new Drawer(
          child: new ListView(
            children: <Widget>[
              new Container(child: new DrawerHeader(child: new Container())),
              new Container (
                child: new Column(
                    children: <Widget>[
                      new ListTile(leading: new Icon(Icons.info),
                          onTap:(){
                              setState((){
                                text = "info pressed";
                              });
                          }
                      ),
                      new ListTile(leading: new Icon(Icons.save),
                          onTap:(){
                            setState((){
                              text = "save pressed";
                            });
                          }
                      ),
                      new ListTile(leading: new Icon(Icons.settings),
                          onTap:(){
                            setState((){
                              text = "settings pressed";
                            });
                          }
                      ),

                    ]
                ),
              )
            ],
          ),
        ),
        appBar: new AppBar(title: new Text("Test Page"),),
        body: new Center(child: new Text((text)),
        ));
  }
}