“viewWillTransitionToSize:” not called in iOS 9 when the view controller is presented modally
I present a view controller from another one: - (void)showModalView { UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil]; MySecViewController *mySecViewController = [storyboard instantiateViewControllerWithIdentifier:@"secController"]; mySecViewController.delegate = self; [self presentViewController:mySecViewController animated:YES completion:nil]; } Then in the presented UIViewController , the method viewWillTransitionToSize:withTransitionCoordinator: is called in iOS 8 but not in iOS 9 ... Thanks In your current view controller, if you override