Difference between UITouch and UIGestureRecognizer?
There is interesting difference present between UITouch and UIGestureRecognizer.
UITouch
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UIGestureRecognizer
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An UITouch object represents the presence or movement of a finger on the device screen for a particular event(single touch or multi touch).
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It is a routine that check if the fingers have performed some special gestures like Tap,Pinch,Rotation,Swipe,Pan,Longpress.
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This object recognize changes in a certain order during the course of an event& also report whenever there is changes in touches.
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Gesture recognizers recognize a discrete event such as a tap or a swipe but do not report changes within the gesture
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Different phase of a finger touch :
UITouchPhaseBeganUITouchPhaseMovedUITouchPhaseStationaryUITouchPhaseEndedUITouchPhaseCancelled |
Different state of a gesture recogniser :
UIGestureRecognizerStatePossible
UIGestureRecognizerStateBegan
UIGestureRecognizerStateChanged
UIGestureRecognizerStateEnded
UIGestureRecognizerStateCancelled
UIGestureRecognizerStateFailed
UIGestureRecognizerStateRecognized
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Introduced in iOS 2.0
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Introduced in iOS 3.2
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