Flutter Drawer Widget-更改Scaffold.body的内容

问题描述

使用Flutter Scaffold.Drawer时-可以使Drawer中的链接更改页面上的内容（Scaffold.body）吗？

When using the Flutter Scaffold.Drawer - is it possible to have the links in the Drawer change the content (Scaffold.body) on the page?

导航抽屉中的链接会更改Android中的片段。

Similarly to having links in the navigation drawer change a Fragment in Android.

推荐答案

您可以通过与您的抽屉进行交互，简单地更改感兴趣内容的状态 这样的项目：

You can simply change the state of the content of your interest by interacting with your Drawer items like this:

这是此示例的相关代码：

Here is the relevant code for this example:

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)),
        ));
  }
}

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