title: Interface Builder UIView background turns black after segue
body: <p>I have a UIView laid out in IB on a storyboard with a modal transition type.  It has transparent sections that should show parts of the underlying UIView after the segue.  I can see that those areas are transparent during the animation, but once the movement is complete, they turn black.</p>
  
  <p>I have tried <code>[self.view setOpaque:NO]</code> and <code>[self.view setBackgroundColor:[UIColor clearColor]]</code> in the following locations and it doesn't seem to work.</p>
  
  <p>In first view</p>
  
  <ul>
  <li>prepareForSegue</li>
  </ul>
  
  <p>In a custom segue class</p>
  
  <ul>
  <li>perform</li>
  </ul>
  
  <p>In modal view</p>
  
  <ul>
  <li>initWithNibName</li>
  <li>viewDidLoad</li>
  <li>viewWillAppear</li>
  </ul>
  
  <p>Can anyone help?</p>