The abstract superclass for all feedback generators.
class UIImpactFeedbackGenerator
A concrete feedback generator subclass that creates haptics to simulate physical impacts.
class UINotificationFeedbackGenerator
A concrete feedback generator subclass that creates haptics to communicate successes, failures, and warnings.
class UISelectionFeedbackGenerator
A concrete feedback generator subclass that creates haptics to indicate a change in selection.
class UICanvasFeedbackGenerator
A concrete feedback generator subclass that creates haptics to indicate events on a drawing canvas.
우리의 경우 특정 범위 이상 넘어갔을 때 impact만 주면 되기때문에,
UIImpactFeedbackGenerator를 사용한다.
https://developer.apple.com/design/human-interface-guidelines/playing-haptics#Impact