Important: UIActionSheetDelegate is deprecated in iOS 8. (Note that UIActionSheet is also deprecated.) To create and manage action sheets in iOS 8 and later, use UIAlertController.
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The UIActionSheetDelegate protocol defines the methods a delegate of a UIActionSheet object should implement. The delegate implements the button actions and any other custom behavior. Some of the methods defined in this protocol are optional.
If you add your own buttons or customize the behavior of an action sheet, implement a delegate conforming to this protocol to handle the corresponding delegate messages. Use the delegate property of the action sheet object to specify one of your application objects as the delegate.
Optionally, you can implement the actionSheetCancel: method to take the appropriate action when the system cancels your action sheet. If the delegate does not implement this method, the default behavior is to simulate the user clicking the cancel button and closing the view.
You can also optionally augment the behavior of presenting and dismissing action sheets using the methods in Customizing Behavior.
For apps that run in versions of iOS prior to iOS 8, the UIAlertViewDelegate protocol defines the methods a delegate of a UIAlertView object should implement. The delegate implements the button actions and any other custom behavior. Some of the methods defined in this protocol are optional.
The UIPopoverControllerDelegate protocol defines the methods you can implement for the delegate of a UIPopoverController object. Popover controllers notify their delegate whenever user interactions would cause the dismissal of the popover and, in some cases, give the user a chance to prevent that dismissal.
This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.