didEnterBackground
An identifier for a message about a host app beginning to run in the background.
Declaration
static var didEnterBackground: NotificationCenter.BaseMessageIdentifier<NSExtensionContext.DidEnterBackgroundMessage> { get }Discussion
Use this identifier with NotificationCenter’s addObserver(of:for:using:) or messages(of:for:bufferSize:) methods to observe messages of type NSExtensionContext.DidEnterBackgroundMessage.