title: Asset Catalog Compiler Error
body: <p>I'm not sure what I did to get this error in Xcode 5:  </p>
  
  <p>"None of the input catalogs contained a matching app icon set named "AppIcon"".</p>
  
  <p>My app was building fine - then my machine locked up tighter than the arctic - don't know why - and now I get this error.</p>
  
  <p>(There was an existing answer to this same question - but I couldn't quite understand it.  Sorry)</p>
  
  <p>Thanks for any help.</p>