title: In iOS 7, how do you access the topLayoutGuide / bottomLayoutGuide in Interface Builder?
body: <p>Using XCode 5, downloaded today. iOS 7. When I run app the table view header appears underneath the navigation bar, I don't mind it scrolling underneath the navbar but I'd like for it to appear unobstructed initially. I am trying to figure out how to use the topLayoutGuide mentioned in the iOS 7 transition guide, which says you can set a constraint relative to it, but doesn't explain how.</p>
  
  <p>Anyone know?</p>
  
  <p>Transition guide here: 
  <a href="http://tinyurl.com/mgdl4sg" rel="noreferrer">http://tinyurl.com/mgdl4sg</a></p>