Shake to execute some code for debugging. To be inserted into view controller.

ShakeToDebug.swift

	override func viewDidAppear(animated: Bool) {
		super.viewDidAppear(animated)

		#if DEBUG
			// Shake to debug
			becomeFirstResponder()
		#endif
		
		// ...
	}

	#if DEBUG
		private func shakeToDebug() {
			// ...
		}
		
		override func canBecomeFirstResponder() -> Bool {
			// Shake to debug
			return true
		}

		override func motionEnded(motion: UIEventSubtype, withEvent event: UIEvent?) {
			// Shake to debug
			shakeToDebug()
		}
	#endif