title: AutoLayout Constrains Issue
body: <p><strong>I have a simple UIView Controller, Navigation Bar and UITextView with some text inside!</strong></p>
  
  <ul>
  <li><p>I just reset is to suggested constraints and it looks great on a
  preview </p></li>
  <li><p>BUT when I run simulator <code>UITextView</code> start scrolling from the middle<br>
  not from top where text starts!!! it just driven me crazy!!!</p></li>
  <li><p>I have tried to setup constrains manually too and I seeing great<br>
  results on preview screen But on simulator the same issue, starts<br>
  from de middle SOS please!</p></li>
  </ul>
  
  <p>Here are links to the images ("HISTORIA" IS A TOP WORD BUT NOT ON SIMULATOR) ! </p>
  
  <p><a href="https://www.dropbox.com/s/j9tavqnotrqogmg/Screen%20Shot%202015-02-06%20at%2022.00.26.png?dl=0" rel="nofollow">enter link description here</a></p>
  
  <p><a href="https://www.dropbox.com/s/phtnzx0bzx9q1rk/Screen%20Shot%202015-02-06%20at%2021.59.40.png?dl=0" rel="nofollow">enter link description here</a></p>