Type Method

setAnimationDelegate(_:)

Sets the delegate for any animation messages.

Declaration

class func setAnimationDelegate(_ delegate: Any?)

Parameters

delegate

An object that defines the methods registered using the setAnimationWillStart(_:) and setAnimationDidStop(_:) methods. The view maintains a strong reference to this object for the duration of the animation.

Discussion

You can specify an animation delegate in cases where you want to receive messages when the animation starts or stops. After calling this method, you should call the setAnimationWillStart(_:) and setAnimationDidStop(_:) methods as needed to register appropriate selectors. By default, the animation delegate is set to nil.

You primarily use this method to set the delegate for animation blocks created using the begin/commit animation methods. Calling this method from outside an animation block does nothing.

Use of this method is discouraged in iOS 4.0 and later. If you are using the block-based animation methods, you can include your delegate’s start and end code directly inside your block.

See Also

Related Symbols

class func beginAnimations(String?, context: UnsafeMutableRawPointer?)

Marks the beginning of a begin/commit animation block.

class func commitAnimations()

Marks the end of a begin/commit animation block and schedules the animations for execution.

class func setAnimationWillStart(Selector?)

Sets the message to send to the animation delegate when the animation starts.

class func setAnimationDidStop(Selector?)

Sets the message to send to the animation delegate when animation stops.