managing-app-life-cycel.md

App Life cycle

In iOS 13 and later, use UISceneDelegate objects to respond to life-cycle events in a scene-based app.

In iOS 12 and earlier, use the UIApplicationDelegate object to respond to life-cycle events.

Scene support is an opt-in feature. To enable basic support, add the UIApplicationSceneManifest key to your app’s Info.plist file as described in Specifying the Scenes Your App Supports.

In iOS 13 and later, always provide a launch storyboard for your app. Don’t use static launch images.

References

Managing Your App's Life Cycle

Responding to the Launch of Your App

Preparing Your UI to Run in the Foreground