A UIView subclass that fades away more the harder you press on it, and eventually disappears if you press hard enough. iOS 9 only, of course.

VanishingView.m

extension UIView {
    override public func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent?) {
        if let touch = touches.first {
            self.alpha = 1 - touch.force / touch.maximumPossibleForce
            
            if touch.force == touch.maximumPossibleForce {
                self.removeFromSuperview()
            }
        }
    }
    
    override public func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {
        UIView.animateWithDuration(1, animations: {
            self.alpha = 1;
        })
    }
}