Event public enum Event finished(at:) Indicates the animation has fully completed. Declaration Swift case finished(at: T.ValueType) retargeted(from:to:) Indicates that the animation’s target value was changed in-flight (i.e. while the animation was running). Declaration Swift case retargeted(from: T.ValueType, to: T.ValueType) Parameters from The previous target value of the animation. to The new target value of the animation.