Flutter Navigation pop to index 1

问题:

I am recursively adding routes to the navigator. There could be 20 views or more. Pop works as advertised, but I would like to pop to index 1 and remove all push history. is there a way to replace this pop command with something like... returntoIndex0...

      new ListTile(
        title: new RaisedButton(
          child: new Text("POP"),
          onPressed: () {
            var route = new MaterialPageRoute(
              builder: (BuildContext context) =>
                  new NextPage3(value:"hi there from 3"),
            );
            Navigator.pop(context);
          },
        ),
      ),

回答1:

If you do not use named routes, you can use

Navigator.of(context).popUntil((route) => route.isFirst);

回答2:

If you are using MaterialPageRoute to create routes, you can use this command:

Navigator.popUntil(context, ModalRoute.withName(Navigator.defaultRouteName))

Navigator.defaultRouteName reflects the route that the application was started with. Here is the piece of code that illustrates it in more detail:

child: InkWell(
          child: Row(
            mainAxisAlignment: MainAxisAlignment.spaceEvenly,
            children: <Widget>[
              Image(
                image: AssetImage('assets/img/ic_reset.png'),),
              Text('Change my surgery details',
                style: TextStyle(color: Colors.blue, decoration: TextDecoration.underline),),
            ],
          ),
          onTap: () =>
              Navigator.popUntil(context, ModalRoute.withName(Navigator.defaultRouteName))
        ),

Hope this helps.

回答3:

Use popUntil method as mentioned in the docs

Typical usage is as follows:

Navigator.popUntil(context, ModalRoute.withName('/login'));

回答4:

In case you know exactly how many pops should be performed:

For example for 2 pops:

count = 0;
Navigator.popUntil(context, (route) {
    return count++ == 2;
});

回答5:

For me I used this when pushing a new page:

widget = MyWidget();
Route route = CupertinoPageRoute(builder: (context) => widget, settings:RouteSettings(name: widget.toStringShort()));
Navigator.push(context, route);

Then to go back to specific page:

Navigator.of(context).popUntil((route) => route.settings.name == "MyWidget");

回答6:

//========================================================
          new ListTile(
            title: new RaisedButton(
              child: new Text("POP until"),
              onPressed: () {
                var route = new MaterialPageRoute(
                  builder: (BuildContext context) =>
                      new NextPage3(value:"hi there from 3"),
                );
               //Navigator.pop(context, ModalRoute.withName('/'));
                Navigator.popUntil(context,ModalRoute.withName('/'));                
              },
            ),
          ),
//========================================================

replace .pop with .popUntil, actually works very elegantly.