title: "Unbalanced calls to begin/end appearance transitions" warning when push a view in a modal way in XCode 4 with Storyboard
body: <p>After some research on the web without success, I come here to ask you the question about my warning.</p>
  
  <p>Actually, I have a view V1 with a navigation controller and I want to push a modal view V2 when V1 has finished loading.
  So I use the <code>performSegueWithIdentifier</code> method (I'm using storyboard).
  Here is my code:</p>
  
  <pre><code>[self performSegueWithIdentifier:@"showConnexionViewSegue" sender:self];
  </code></pre>
  
  <p>And when I compile, I got this warning:</p>
  
  <pre><code>Unbalanced calls to begin/end appearance transitions for &lt;UINavigationController: 0x6849b30&gt;
  </code></pre>
  
  <p>Can anyone help me?</p>