I'm not sure what I did to get this error in Xcode 5:
"None of the input catalogs contained a matching app icon set named "AppIcon"".
My app was building fine - then my machine locked up tighter than the arctic - don't know why - and now I get this error.
(There was an existing answer to this same question - but I couldn't quite understand it. Sorry)
Thanks for any help.
I had this problem when I accidentally saved a .psd as a .png. Converting the image to an actual png instead of a Photoshop file fixed it for me.