Recently a client had some issues uploading our app to the App Store, citing the following error:

Icon.png: icon dimentions (114 x 114) don’t meet the size requirements. The icon file must be 57×57 pixels in .png format.

This seemed odd to me, as we had very explicitly created a 57×57 (standard display) icon and a 114×114 (Retina display) icon, and followed Apple’s “@2x” naming convention.

After some digging, I found that the root of the issue was the info.plist file for the app. Apparently you must not only follow the “@2x” convention, but also explicitly specify paths to the various sizes of your App’s icon files in a “CFBundleIconFiles” array.

I found a great article at Use Your Loaf that helped resolve the issue. By specifying paths for each size of the app icon, the App Store error was resolved and we could also include icons at the correct sizes for all iOS device screens.