Instance Method

applicationDidReceiveMemoryWarning:

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

Declaration

- (void)applicationDidReceiveMemoryWarning:(UIApplication *)application;

Parameters

application

Your singleton app object.

Discussion

Your implementation of this method should free up as much memory as possible by purging cached data objects that can be recreated (or reloaded from disk) later. You use this method in conjunction with the didReceiveMemoryWarning of the UIViewController class and the UIApplicationDidReceiveMemoryWarningNotification notification to release memory throughout your app.

It is strongly recommended that you implement this method. If your app does not release enough memory during low-memory conditions, the system may terminate it outright.

See Also

Responding to App State Changes and System Events

- applicationDidBecomeActive:

Tells the delegate that the app has become active.

- applicationWillResignActive:

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

- applicationDidEnterBackground:

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

- applicationWillEnterForeground:

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

- applicationWillTerminate:

Tells the delegate when the app is about to terminate.

- applicationProtectedDataWillBecomeUnavailable:

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

- applicationProtectedDataDidBecomeAvailable:

Tells the delegate that protected files are available now.

- applicationSignificantTimeChange:

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