title: How do I position views in Interface Builder for both 3.5” and 4” Retina?
body: <p>I want to position a UIView so it appears in the centre on both 3.5” and 4” Retina screens. What is the best way to do this? If I turn off all the Autosizing bars I would expect it to align to the centre of the screen, but this doesn't seem to happen.</p>
  
  <p>I am happy to use the new Autolayout, but I don't know how to get it to do this either.</p>