swift 如何实现点击view后显示灰色背景

有这样一种场景，当我们点击view的时候，需要过0.几秒显示一个灰色或者别的颜色的背景

用button来实现，只有按下去的时候才会出现，往往在快速按下，快速抬起的时候是看不出这个变化的

下边是解决方案

 override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

         let touch = touches.first!
         let p = touch.locationInView(self.retweetBackgroundView)
         let insideRetweet = CGRectContainsPoint(self.retweetBackgroundView!.bounds ,p)

         if self.retweetBackgroundView?.hidden == false && insideRetweet {

             self.retweetBackgroundView!.performSelector("setBackgroundColor:", withObject: kWBCellHighlightColor, afterDelay: 0.15)
             self._touchRetweetView = true
         }else {

             self.contentView!.performSelector("setBackgroundColor:", withObject: kWBCellHighlightColor, afterDelay: 0.15)
             self._touchRetweetView = false
         }

     }

     override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent?) {

         self.touchesRestoreBackgroundColor()
     }

     override func touchesCancelled(touches: Set<UITouch>?, withEvent event: UIEvent?) {

         self.touchesRestoreBackgroundColor()
     }

     func touchesRestoreBackgroundColor() {
         NSObject.cancelPreviousPerformRequestsWithTarget(self.retweetBackgroundView!, selector: "setBackgroundColor:", object: kWBCellHighlightColor)
          NSObject.cancelPreviousPerformRequestsWithTarget(self.contentView!, selector: "setBackgroundColor:", object: kWBCellHighlightColor)
         self.retweetBackgroundView!.backgroundColor = UIColor.whiteColor()
         self.contentView.backgroundColor = kWBCellInnerViewColor
     }