title: Is there any way to add constraint between a view and the top layout guide in a xib file?
body: <p>In iOS 7, we can now add a constraint between a view and the top layout guide, which I think is very useful to solve the status bar offset issue in iOS7(especially when there is no navigation bar in the view).</p>
  
  <p>In a storyboard file, I can add this kind of constraints easily. Just hold the control key then drag the view to the container, it will show the "Top Space to Top Layout Guide" option.</p>
  
  <p><img src="https://i.stack.imgur.com/nKAR2.png" alt="enter image description here"></p>
  
  <p>But when I do the same operation in a xib file, this option disappears.</p>
  
  <p><img src="https://i.stack.imgur.com/RRWBq.png" alt="enter image description here"></p>
  
  <p>So, is there any way to add this kind of constraints in xib files? Or do I have to add them with code?</p>