Instance Method

applicationSignificantTimeChange(_:)

Tells the delegate when there is a significant change in the time.

Declaration

optional func applicationSignificantTimeChange(_ application: UIApplication)

Parameters

application

Your singleton app object.

Discussion

Examples of significant time changes include the arrival of midnight, an update of the time by a carrier, and the change to daylight savings time. The delegate can implement this method to adjust any object of the app that displays time or is sensitive to time changes.

Prior to calling this method, the app also posts a UIApplicationSignificantTimeChange notification to give interested objects a chance to respond to the change.

If your app is currently suspended, this message is queued until your app returns to the foreground, at which point it is delivered. If multiple time changes occur, only the most recent one is delivered.

See Also

Responding to App State Changes and System Events

func application(UIApplication, willFinishLaunchingWithOptions: [UIApplicationLaunchOptionsKey : Any]? = nil)

Tells the delegate that the launch process has begun but that state restoration has not yet occurred.

func application(UIApplication, didFinishLaunchingWithOptions: [UIApplicationLaunchOptionsKey : Any]? = nil)

Tells the delegate that the launch process is almost done and the app is almost ready to run.

func applicationDidFinishLaunching(UIApplication)

Tells the delegate when the app has finished launching. Don’t use. Instead, use application(_:didFinishLaunchingWithOptions:).

func applicationDidBecomeActive(UIApplication)

Tells the delegate that the app has become active.

func applicationWillResignActive(UIApplication)

Tells the delegate that the app is about to become inactive.

func applicationDidEnterBackground(UIApplication)

Tells the delegate that the app is now in the background.

func applicationWillEnterForeground(UIApplication)

Tells the delegate that the app is about to enter the foreground.

func applicationWillTerminate(UIApplication)

Tells the delegate when the app is about to terminate.

func applicationProtectedDataWillBecomeUnavailable(UIApplication)

Tells the delegate that the protected files are about to become unavailable.

func applicationProtectedDataDidBecomeAvailable(UIApplication)

Tells the delegate that protected files are available now.

func applicationDidReceiveMemoryWarning(UIApplication)

Tells the delegate when the app receives a memory warning from the system.