hide method error

[fg2q1q3q]

I encountered the problem of hide () method error reporting in the process of using it.
My code like this：

           pr.show();
           UserDao.login( _userName,_password).then((res) {
              pr.hide();
              if (res != null) {
                LocalStorage.save(Config.USER_NAME_KEY, _userName);
                LocalStorage.save(Config.PW_KEY, _password);
                NavigatorUtils.goHome(context);
             }
          });

But the error is as follows

E/flutter (32311): At this point the state of the widget's element tree is no longer stable. To safely refer to a widget's ancestor in its dispose() method, save a reference to the ancestor by calling inheritFromWidgetOfExactType() in the widget's didChangeDependencies() method.

[fayaz07]

please check if the progress dialog is in showing state or hidden state

if(pr.isShowing())
  pr.hide();

[fg2q1q3q]

First of all, the above suggestions didn't help, and I found that isShowing is always false by printing logs and viewing source code.

Now I have found the reason for the problem, because every network request I will first determine whether the network is available, if not cancel the request, because this is not a time-consuming operation, which led to the error, you can reproduce this error with the following code：

           pr.show();
           Future.delayed(Duration(seconds: 0)).then((onValue){
              print("pr show? ${pr.isShowing()}");
              pr.hide();
             }
           );

1.Whether seconds is 0 or 5, isshowing is false forever, which is a bug.
2.When seconds is 5, it is normal, but when seconds is 0, it will report an error. It is suggested to add a rendering completion identifier, cancel the rendering if no rendering is completed when calling hide, and call isShowing in hide for judgment.

[fayaz07]

@fg2q1q3q I have got the bug, acutally the isShowing is remaining unchanged on any operation, thanks for reporting. I have fixed the issue, soon I will update the library soon :)

[fayaz07]

fixed in the latest version progress_dialog: ^1.1.0+1

[fg2q1q3q]

Thank you. I've tried. Everything's OK.

[fayaz07]

@fg2q1q3q :)