animationCurve
The timing curve for the animation.
Declaration
var animationCurve: NSAnimation.Curve { get set }Discussion
The animation curve describes the relative frame rate over the course of the animation; predefined curves are linear, ease in (slow down near end), ease out (slowly speed up at start), and ease in-ease out (S-curve). Changing the value of this property changes the timing of an in-progress animation. The value of this property is ignored if the delegate implements the animation(_:valueForProgress:) method.
Setting this property to an invalid value raises an exception. For a list of valid animation values, see NSAnimation.Curve.