Motion.swift

func addMotion(for view: UIView) {
    let min: CGFloat = -30
    let max: CGFloat = 30

    let xMotion = UIInterpolatingMotionEffect(keyPath: "layer.transform.translation.x", type: .tiltAlongHorizontalAxis)
    xMotion.minimumRelativeValue = min
    xMotion.maximumRelativeValue = max

    let yMotion = UIInterpolatingMotionEffect(keyPath: "layer.transform.translation.y", type: .tiltAlongVerticalAxis)
    yMotion.minimumRelativeValue = min
    yMotion.maximumRelativeValue = max

    let motionEffectGroup = UIMotionEffectGroup()
    motionEffectGroup.motionEffects = [xMotion,yMotion]

    view.addMotionEffect(motionEffectGroup)
}