Tells the receiver that a motion event has begun.
- iOS 3.0+
- tvOS 9.0+
An event-subtype constant indicating the kind of motion. A common motion is shaking, which is indicated by
Subtype Motion Shake
An object representing the event associated with the motion.
UIKit informs the responder only when a motion event starts and ends. It does not report intermediate shakes. Motion events are delivered initially to the first responder and are forwarded up the responder chain as appropriate.
The default implementation of this method forwards the message up the responder chain.