Warning: Attempt to present ViewController on ViewController whose view is not in the window hierarchy

Question

I have already looked through related questions but nothing has solved my problem.

I am attempting to use dismissViewControllerAnimated:animated:completion

Answer 1

Use this code

[[[[[UIApplication sharedApplication] delegate] window] rootViewController] presentViewController:composer                                                                                                    animated:YES completion:nil];

Instead of

[self presentViewController:picker animated:YES completion:NULL];