title: presentViewController in iPhone5s
body: <p>I have created a object MFMailComposeViewController for displaying the mail composer, it working on all 32bit devices but when I run it on iPhone5s it just displayed and dismisses automatically showing error,</p>
  
  <pre><code>Unbalanced calls to begin/end appearance transitions for &lt; UITabBarController: 0xcc7f8f0&gt;.
  </code></pre>
  
  <p>There is tabbar controller that is root of window and I am trying present the mail view on self.<br/>
  I have tried everything but not able to findout why its not working on iPhone5s.<br/>Let me know if anyone also faces the same issue?</p>