title: iOS 6 presentviewcontroller displays blackscreen
body: <p>I just built a little App to test the use of changing views programmatically, so I have my two views in the storyboard and my two classes.
  Now I want that when I tap the button in my ViewController that it shows up the RedViewController. But when I tap on this button, I just can a black screen.
  Has anyone an idea how to fix that?</p>
  
  <pre><code>-(IBAction)showred:(id)sender{
  
      RedViewController *viewController = [[RedViewController alloc] init];
      [self presentViewController:viewController animated:YES completion:nil];
  }
  </code></pre>
  
  <p>Thanks Michael</p>