Navigator.push() inside showdialog not working

问题

Trying to navigate to a new screen using Navigator.push(), but it's not working. I have created a custom class to show AlertDialog and call the class with the object to show alertDialog

_customerAlertDialog.showConfirmAlertDialog(
   context: context,
   title: "Login In",
   subTitle: "You need to login to purchase.",
   onTapResponse: (bool val) async {
     if (val) {
       /// close AlertDialog
       Navigator.of(context).pop();
       Navigator.of(context).push(MaterialPageRoute(builder: (context) => LoginScreen()));
       print("show the login screen");

     } else {
       //TODO : when user click no.
     }
   });

navigator.pop() is working, print statement is working, but Navigator.push is not working. Also tried this:

Navigator.push(context,MaterialPageRoute(builder: (context) => LoginScreen())); 

回答1:

The context object that you use in Navigator.of(context).pop() isn't aware of the dialog.

If your custom alert dialog is calling showDialog, consider passing on the BuildContext object that is returned by the builder:

showDialog(
  context: context,
  builder: (BuildContext ctx) { 
    // ctx is a context object that will be aware of the dialog
    // consider passing this along to onTapResponse as an argument
  },
);

Then you can use that BuildContext to get the navigator that will be able to close the dialog:

onTapResponse: (BuildContext ctx, bool val) async {
  if (val) {
    // close AlertDialog
    Navigator.of(ctx).pop();
    Navigator.of(ctx).push(MaterialPageRoute(builder: (context) => LoginScreen()));
    print("show the login screen");
  } else {
    //TODO : when user click no.
  }
}

来源：https://stackoverflow.com/questions/63142538/navigator-push-inside-showdialog-not-working