title: iOS 7 detail layout when master has navigation bar prompt
body: <p>I run into a layout problem in iOS 7:</p>
  
  <p><img src="https://i.stack.imgur.com/1Ys5v.png" alt="Screenshot"></p>
  
  <p>To reproduce create a simple master-detail-app and insert this line in <em>MasterViewController.m</em> :</p>
  
  <pre><code>self.navigationItem.prompt = @"Master";
  </code></pre>
  
  <p>and this in <em>DetailViewController.m</em> :</p>
  
  <pre><code>self.edgesForExtendedLayout = UIRectEdgeNone;
  </code></pre>
  
  <p>Both lines in <code>viewDidLoad</code>.</p>
  
  <p>The detail view's frame does not update correctly when the navigation bar shrinks to its normal size.</p>
  
  <p>How should I fix this?</p>