Asks the delegate if a gesture recognizer should begin interpreting touches.
- iOS 3.2+
- tvOS 9.0+
An instance of a subclass of the abstract base class
UIGesture. This gesture-recognizer object is about to begin processing touches to determine if its gesture is occurring.
YES (the default) to tell the gesture recognizer to proceed with interpreting touches,
NO to prevent it from attempting to recognize its gesture.