Instance Method

viewDidUnload

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

Declaration

- (void)viewDidUnload;

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 call this method after the view controller'€™s view had been released. This method was your chance to perform any final cleanup. If your view controller stored separate references to the view or its subviews, you could use this method to release those references. You could also use this method to remove references to any objects that you created to support the view but that are no longer needed now that the view is gone. You would not use this method to release user data or any other information that cannot be easily recreated.

In iOS 6 and later, clearing references to views and other objects in your view controller is unnecessary.

At the time this method is called, the view property is nil.

See Also

Methods

- registerForPreviewingWithDelegate:sourceView:

Registers a view controller to participate with 3D Touch preview (peek) and commit (pop).

Deprecated
- unregisterForPreviewingWithContext:

Unregisters a previously registered view controller identified by its context object.

Deprecated
- 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
- viewWillUnload

Called just before releasing the controller'€™s view 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