title: Flip landscape UIViewController
body: <p>I have a button in my UIViewController, I want to have Flip transaction when I press the button, I have transaction but it's flip portrait, would you please help me! 
  I want to have it as Landscape</p>
  
  <p>here is my code :</p>
  
  <pre><code>TestViewController *ctrl = [[TestViewController alloc] init];
  [UIView transitionFromView:self.view
                      toView:ctrl.view
                    duration:1
                     options:UIViewAnimationOptionTransitionFlipFromTop
                  completion:nil];
  
  [self.navigationController pushViewController:ctrl animated:NO];
  </code></pre>
  
  <p>Thanks in advance!</p>