Asks the view if the gesture recognizer should be allowed to continue tracking touch events.
- iOS 6.0+
- tvOS 9.0+
The gesture recognizer that is attempting to transition out of the
Recognizer .State .possible
true if the gesture recognizer should continue tracking touch events and use them to trigger a gesture or
false if it should transition to the
Subclasses may override this method and use it to prevent the recognition of particular gestures. For example, the
UISlider class uses this method to prevent swipes parallel to the slider’s travel direction and that start in the thumb.
At the time this method is called, the gesture recognizer is in the
UIGesture state and thinks it has the events needed to move to the
The default implementation of this method returns