UILaunchScreens
The user interfaces to show while an app launches in response to different URL schemes.
Discussion
You use this key if your app supports launching in response to one or more URL schemes, and if you want to provide different launch screens for different launch triggers. If you need only one launch screen, use UILaunchScreen instead.
To define launch screens, create an array of dictionaries, each similar to the one you might provide for UILaunchScreen, but with an added UILaunchScreenIdentifier key that uniquely identifies the screen. Store the array as the value for the UILaunchScreenDefinitions key.
To map from URL schemes to a launch screens, create a dictionary of schemes and identifiers, and store it as the value for the UIURLToLaunchScreenAssociations key. Additionally, indicate a default launch screen by setting a value for the UIDefaultLaunchScreen key.