Tips of a motion like iOS system transition.

system_animation.swift

// https://qiita.com/usagimaru/items/4306f261457e82641e4a

UIView.perform(.delete,
               on: [],
               options: [.beginFromCurrentState, .allowUserInteraction],
               animations: {
                   aView.frame = targetFrame
		},
               completion: nil)

or


UIView.animate(withDuration: 0.5,
               delay: 0,
               usingSpringWithDamping: 1.0,
               initialSpringVelocity: 0,
               options:[.beginFromCurrentState, .allowUserInteraction],
               animations: {
                   aView.frame = targetFrame
		},
               completion: nil)