didEnterBackgroundNotification
A notification that indicates that the scene is running in the background and is no longer onscreen.
Declaration
nonisolated class let didEnterBackgroundNotification: NSNotification.NameDiscussion
Use this notification to reduce your scene’s memory usage, free up any shared resources, and clean up your scene’s user interface. Shortly after your notification handler returns, UIKit takes a snapshot of your scene’s interface for display in the app switcher. Make sure your interface doesn’t contain sensitive user information.
UIKit also calls the sceneDidEnterBackground(_:) method of your scene delegate object.
For more information about what to do when your app enters the background, see Preparing your UI to run in the background.