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whats the use of UIApplicationDidEnterBackgroundNotification in iPhone app or how we can take benifit from it
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Swift version: 5.6. Subclassing UIApplication allows you to override functionality such as opening URLs or changing your icon, but it's a non-trivial task in Swift because of the @UIApplicationMain attribute. If you look in your AppDelegate.
Tells the delegate that the app is about to enter the foreground.
There are two ways to be notified when your app moves to the background: implement the applicationWillResignActive() method in your app delegate, or register for the UIApplication. willResignActiveNotification notification anywhere in your app.
A structure that defines the name of a notification.
This notification means the user "quit" your app on an iPhone 4 - It happens when a phone call or text message comes in and user accepts the interruption (answers/replies), or when the user has pressed the Home button.
I found this link on SO that shows the interaction between all states, and the appropriate notifications: http://www.drobnik.com/touch/2010/07/understanding-ios-4-backgrounding-and-delegate-messaging/
To make use of this notification you can implement applicationDidEnterBackground as @Antwan suggested (in your UIApplicationDelegate class - that's the main class).
Alternatively you could set up a notification handler wherever you want/need in your code:
[[NSNotificationCenter defaultCenter] addObserver: self
selector: @selector(handleEnteredBackground:)
name: UIApplicationDidEnterBackgroundNotification
object: nil];
Good luck!
Oded.
169
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