gistfile1.swift

override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {
        if let touch = touches.first as? UITouch {
            let location = touch.locationInView(self)
            if (!CGRectContainsPoint(ScaleRect(self.bounds, n: 2.0), location))
            {
                self.highlighted = false
            }
        }
    }