InteractiveAnimation-3.swift

@objc func handlePan(_ gesture: UIPanGestureRecognizer) {
	let location = gesture.location(in: self.view)

	// To figure out the fraction completed, take the x location of the touch,
	// and divide it by the maximum x the finger can move to (which is the screen's width)
	let fractionCompleted = location.x / self.view.bounds.width

	// Changing this property changes the % complete of the animation.
	// Try experimenting with a different fraction and see what you get
	animator.fractionComplete = fractionCompleted
}