iOS Parallax Effect as UIView Extension

iOS-Parallax-Effect.swift

extension UIView {
  func applyParallax() {

      let amount = 10

      let horizontal = UIInterpolatingMotionEffect(keyPath: "center.x", type: .tiltAlongHorizontalAxis)
      horizontal.minimumRelativeValue = -amount
      horizontal.maximumRelativeValue = amount

      let vertical = UIInterpolatingMotionEffect(keyPath: "center.y", type: .tiltAlongVerticalAxis)
      vertical.minimumRelativeValue = -amount
      vertical.maximumRelativeValue = amount

      let group = UIMotionEffectGroup()
      group.motionEffects = [horizontal, vertical]
      addMotionEffect(group)
  }
}