AlertController is not in the window hierarchy

Question

I\'ve just created a Single View Application project with ViewController class. I would like to show a UIAlertController from a function which is located inside my own class

Answer 1

It helped me to stick a slight delay between the viewDidLoad method and firing the alert method:

   [self performSelector:@selector(checkPhotoPermission) withObject:nil afterDelay:0.1f];