How to push and pop until to a specific route in flutter

Question

I am making an application, In my sign out dialog, i got this code.

  Navigator.of(context).pushAndRemoveUntil(
                    MaterialPageRoute(builder: (context) {
                  return AuthScreen();
                }), (route) {
                  // if( route is (MaterialPageRoute('/')))
                  // {

                  // }
                  // print(route);
                  return false;
                });

I just want to push AuthScreen and remove until the route screen. How to do that?

So after this code, stack contains root screen, and AuthScreen.

Answer 1

You can do this:

Navigator.pushAndRemoveUntil(
    context,   
    MaterialPageRoute(builder: (BuildContext context) => AuthScreen()), 
    ModalRoute.withName('/') // Replace this with your root screen's route name (usually '/')
);

Another way you can try is:

Navigator.pushAndRemoveUntil(
  context,
  MaterialPageRoute(builder: (BuildContext context) => AuthScreen()),
  (Route<dynamic> route) => route is RootPage (your root page's type)
);

Yet another one:

Navigator.pushAndRemoveUntil(
  context,
  MaterialPageRoute(builder: (BuildContext context) => AuthScreen()),
  (Route<dynamic> route) => route.isFirst (pop until your first page)
);

Sample app:

import 'dart:async';

import 'package:flutter/material.dart';
import 'package:in_app_update/in_app_update.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      initialRoute: '/',
      routes: {
        '/': (context) => MyHome(),
      },
    );
  }
}

class MyHome extends StatelessWidget {
  const MyHome({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Sample App'),
      ),
      body: Center(
        child: TextButton(
          onPressed: () => Navigator.push(
              context, MaterialPageRoute(builder: (context) => MyChild())),
          child: Text('To child page'),
        ),
      ),
    );
  }
}

class MyChild extends StatelessWidget {
  const MyChild({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Child'),
      ),
      body: Center(
        child: TextButton(
          onPressed: () => Navigator.pushAndRemoveUntil(
              context,
              MaterialPageRoute(
                  builder: (BuildContext context) => MySecondChild()),
              ModalRoute.withName('/')),
          child: Text('Push to Second Child and remove until homepage'),
        ),
      ),
    );
  }
}

class MySecondChild extends StatelessWidget {
  const MySecondChild({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Second Child'),
      ),
      body: Center(
        child: TextButton(
          onPressed: () => Navigator.pop(context),
          child: Text('Pop'),
        ),
      ),
    );
  }
}