iOS launch screen settings.
| Default | Use the default launch screen (dark blue background). | 
| ImageAndBackgroundRelative | Use a custom launch screen image specified in the iOS Player Settings or with PlayerSettings.iOS.SetLaunchScreenImage which will be scaled across the entire screen. | 
| CustomXib | Use a specified custom Interface Builder (.xib) file in Player Settings. | 
| None | Generate the Xcode project without any custom launch screens. | 
| ImageAndBackgroundConstant | Use a custom launch screen image specified in the iOS Player Settings or with PlayerSettings.iOS.SetLaunchScreenImage and use its original dimensions. |