问题:

I used Navigator.push up to 6 screens to get to the payment page. After Payment, I want to push to the "Payment Successful" page then remove all the previous screens i.e using the back button will return to the very first screen.

NOTE: I have tried pushReplacementNamed and it doesn't work.

回答1:

I figured it out. It was the Navigator.pushAndRemoveUntil function. Where i had to pass the PaymentSuccessful widget as the newRoute, and the "/Home" route as the predicate

  _navPaymentSuccessful(){
    Navigator.pushAndRemoveUntil(
      context, 
      MaterialPageRoute(
        builder: (context) => PaymentSuccessful()
      ), 
     ModalRoute.withName("/Home")
    );
  }

回答2:

even simpler and I think a better way would be to do it this way, this Schedules a callback for the end of the current persistent frame,to push to route /loginPage and removes all the previous routes,this way you can make sure that all the frames are rendered and then you navigate to next page.

 SchedulerBinding.instance.addPostFrameCallback((_) {
                Navigator.of(context).pushNamedAndRemoveUntil(
                    '/loginPage', (Route<dynamic> route) => false);
              });