Use of splash screen images is required.

The Asset Catalog is used to manage these images. For details, see the information on launch images on the Apple developer website at https://developer.apple.com/library/ios/recipes/xcode_help-image_catalog-1.0/Recipe.html.

You can find the current Asset Catalog configuration for launch images under MobileDesigner\Platforms\iOS\build\project\Images.xcassets_universal\Images.xcassets\LaunchImage.launchimage\.