title: '__bridge' casts have no effect when not using ARC
body: <p>When compiling an older project in Xcode 4.5, there is a warning:</p>
  
  <blockquote>
    <p>'__bridge' casts have no effect when not using ARC</p>
  </blockquote>
  
  <p>What's the proper way to get rid of this warning, such that the code works well in both ARC and non-ARC projects?</p>