Protocol

UIAlertViewDelegate

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.

Declaration

@protocol UIAlertViewDelegate

Overview

UIAlertViewDelegate is deprecated in iOS 8. (Note that UIAlertView is also deprecated.) To create and manage alerts in iOS 8 and later, use UIAlertController.

Overview

If you add your own buttons or customize the behavior of an alert view, implement a delegate conforming to this protocol to handle the corresponding delegate messages. Use the delegate property of an alert view to specify one of your application objects as the delegate.

If you add your own buttons to an alert view, the delegate must implement the alertView:clickedButtonAtIndex: message to respond when those buttons are clicked; otherwise, your custom buttons do nothing. The alert view is automatically dismissed after the alertView:clickedButtonAtIndex: delegate method is invoked.

Optionally, you can implement the alertViewCancel: method to take the appropriate action when the system cancels your alert view. 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 alert views using the methods in Customizing Behavior.

Topics

Responding to Actions

- alertView:clickedButtonAtIndex:

Sent to the delegate when the user clicks a button on an alert view.

Deprecated

Customizing Behavior

- alertViewShouldEnableFirstOtherButton:

Sent to the delegate to determine whether the first non-cancel button in the alert should be enabled.

Deprecated
- willPresentAlertView:

Sent to the delegate before a model view is presented to the user.

Deprecated
- didPresentAlertView:

Sent to the delegate after an alert view is presented to the user.

Deprecated
- alertView:willDismissWithButtonIndex:

Sent to the delegate before an alert view is dismissed.

Deprecated
- alertView:didDismissWithButtonIndex:

Sent to the delegate after an alert view is dismissed from the screen.

Deprecated

Canceling

- alertViewCancel:

Sent to the delegate before an alert view is canceled.

Deprecated

Relationships

Inherits From

See Also

Deprecated Protocols

UIAccelerometerDelegate

The UIAccelerometerDelegate protocol defines a single method for receiving acceleration-related data from the system. Implementation of this method is optional, but expected.

Deprecated
UIActionSheetDelegate

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.

UIPopoverControllerDelegate

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.

UISearchDisplayDelegate

Important: UISearchDisplayDelegate is deprecated in iOS 8. (Note that UISearchDisplayController is also deprecated.) To manage the presentation of a search bar and display search results in iOS 8 and later, instead use UISearchControllerDelegate.