One of your images could be wrong size (ex: 120x124 instead of 120x120); that can cause the problem.
Error while setting app icon and launch image in xcode 5.1
Question
I get the following error after dragging an image to set it as app icon and launch image
Images.xcassets: The app icon set named "AppIcon" did not have any applicable content.
Images.xcassets: The launch image set named "LaunchImage" did not have any applicable content.
Solution
OTHER TIPS
Remove LaunchImage keyword in your .plist file and try again. I am not sure
I had the same issue using ImageAssets catalog, I've removed the option for use the catalog from project settings, and used the default name for iOS 7: Default@2x
Hope it helped...
One of your icons and one of your splash screen images are not the correct size. I had the same issue and solved it by adding proper sized images for both AppIcon and SplashScreen
A quick solution if you prefer not to use Image sets, you can add the image file to your project and add the following field to your info.plist:
Icon file: yourIcon.png
Be sure to erase the image from any Image set if you added it before.
BR
There is some problem with your image sizes. Please re-check the sizes of your 2x and 3x images.