Instance Method

viewWillUnload

Called just before releasing the controller'€™s view from memory.

Declaration

- (void)viewWillUnload;

Discussion

In iOS 5 and earlier, when a low-memory condition occurred and the current view controller'€™s views were not needed, the system could opt to remove those views from memory. This method was called prior to releasing the actual views so you could perform any cleanup prior to the view being deallocated. For example, you could use this method to remove views as observers of notifications or record the state of the views so it can be reestablished when the views are reloaded.

In iOS 6 and later, clearing references to views is no longer necessary. As a result, any other cleanup related to those views, such as removing them as observers, is also not necessary.

At the time this method is called, the view property is still valid (it has not yet been set to nil).

See Also

Methods

- automaticallyForwardAppearanceAndRotationMethodsToChildViewControllers

Returns a Boolean value that indicates whether appearance and rotation methods are forwarded.

Deprecated
- canPerformUnwindSegueAction:fromViewController:withSender:

Called on a view controller to determine whether it wants to respond to an unwind action.

Deprecated
- didAnimateFirstHalfOfRotationToInterfaceOrientation:

Sent to the view controller after the completion of the first half of the user interface rotation.

Deprecated
- didRotateFromInterfaceOrientation:

Sent to the view controller after the user interface rotates.

Deprecated
- dismissModalViewControllerAnimated:

Dismisses the view controller that was presented by the receiver.

Deprecated
- dismissMoviePlayerViewControllerAnimated

Dismisses a movie player view controller using the standard movie player transition.

Deprecated
- viewControllerForUnwindSegueAction:fromViewController:withSender:

Called when an unwind segue action wants to search a container'€™s children for a view controller to handle the unwind action.

Deprecated
+ prepareInterstitialAds

Prepares the iAd framework to display interstitial ads, which may involve prefetching ad assets.

Deprecated
- presentModalViewController:animated:

Presents a modal view managed by the given view controller to the user.

Deprecated
- presentMoviePlayerViewControllerAnimated:

Presents the movie player view controller using the standard movie player transition.

Deprecated
- requestInterstitialAdPresentation

Asks the framework to display an interstitial ad.

Deprecated
- rotatingFooterView

Returns the footer view to transition during an interface orientation change.

Deprecated
- rotatingHeaderView

Returns the header view to transition during an interface orientation change.

Deprecated
- segueForUnwindingToViewController:fromViewController:identifier:

Called when an unwind segue action needs to transition between two view controllers.

Deprecated
- shouldAutomaticallyForwardRotationMethods

Returns a Boolean value indicating whether rotation methods are forwarded to child view controllers.

Deprecated
- shouldAutorotateToInterfaceOrientation:

Returns a Boolean value indicating whether the view controller supports the specified orientation.

Deprecated
- viewDidUnload

Called when the controller'€™s view is released from memory.

Deprecated
- willAnimateFirstHalfOfRotationToInterfaceOrientation:duration:

Sent to the view controller before performing the first half of a user interface rotation.

Deprecated
- willAnimateRotationToInterfaceOrientation:duration:

Sent to the view controller before performing a one-step user interface rotation.

Deprecated
- willAnimateSecondHalfOfRotationFromInterfaceOrientation:duration:

Sent to the view controller before the second half of the user interface rotates.

Deprecated
- willRotateToInterfaceOrientation:duration:

Sent to the view controller just before the user interface begins rotating.

Deprecated