Question 186509 in Flutter Question posted in
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Flutter – Navigator.of(context).pushAndRemoveUntil() doesn't work

 bool isChecked = false;

  void isValidate() {
    if (_formKey.currentState != null) {
      if (_formKey.currentState!.validate()) {
        print("is valid");
        Navigator.of(context).pushAndRemoveUntil(
            MaterialPageRoute(
              builder: (context) => AnaSayfaView(),
            ),
            (route) => false);
      } else {
        print("is not valid");
      }
    }
  }

I have this code. The error message says:

A page-based route cannot be completed using imperative api, provide a new list without the corresponding Page to Navigator.pages instead.’package:flutter/src/widgets/navigator.dart’:navigator.dart:1Failed assertion: line 3040 pos 7: ‘!pageBased || isWaitingForExitingDecision’

I have tried to navigate another page and not turning back to same page again.

Tags:

2

Answers


  1. 0

    How the PushAndRemoveUntil function works is that it keeps calling the method until when the result gets a true result. Since you are always sending false as the result it will not work.

    Try the following – it will remove remove all page up to the first one and then push that page.

      bool isChecked = false;
  void isValidate() {
    if (_formKey.currentState != null) {
      if (_formKey.currentState!.validate()) {
        print("is valid");
        Navigator.of(context).pushAndRemoveUntil(
            MaterialPageRoute(
              builder: (context) => AnaSayfaView(),
            ),
            (route) => route.isFirst);
      } else {
        print("is not valid");
      }
    }
  }
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  2. 0

    Try this

     WidgetsBinding.instance!.addPostFrameCallback((_) {
    Navigator.of(context).pushAndRemoveUntil(
            MaterialPageRoute(
              builder: (context) => AnaSayfaView(),
            ),
            (route) => false);
    });
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