Shake a NSView

NSView+shake.swift

extension NSView {
	/**
	Shake the view.

	- Note: It will do nothing if the user has enabled the “Reduce motion” accessibility preference.
	*/
	func shake(
		duration: TimeInterval = 0.3,
		direction: NSUserInterfaceLayoutOrientation,
		moveAmount: Double = 5
	) {
		wantsLayer = true

		guard !NSWorkspace.shared.accessibilityDisplayShouldReduceMotion else {
			return
		}

		let translation = direction == .horizontal ? "x" : "y"

		let animation = CAKeyframeAnimation(keyPath: "transform.translation.\(translation)")
		animation.timingFunction = .easeInOut
		animation.duration = duration
		animation.values = [
			-moveAmount,
			moveAmount,
			-(moveAmount / 2),
			moveAmount / 2,
			0
		]

		layer?.add(animation, forKey: nil)
	}
}