of UIGestureRecognizer are the following: •UITapGestureRecognizer •UIPinchGestureRecognizer •UIRotationGestureRecognizer •UISwipeGestureRecognizer •UIPanGestureRecognizer •UIScreenEdgePanGestureRecognizer •UILongPressGestureRecognizer ’
UIEvent?) Tells this object that one or more new touches occurred in a view or window. func touchesMoved(Set<UITouch>, with: UIEvent?) Tells the responder when one or more touches associated with an event changed. func touchesEnded(Set<UITouch>, with: UIEvent?) Tells the responder when one or more fingers are raised from a view or window. func touchesCancelled(Set<UITouch>, with: UIEvent?) Tells the responder when a system event (such as a system alert) cancels a touch sequence. ‘
in gesture recognition follows a path determined by default values of the cancelsTouchesInView, delaysTouchesBegan, delaysTouchesEnded properties: ‘ UIResponderの touchesCancel, touchesBegan, touchesMoved, touchesEnded が前提