title: Table View Cell Background view keep getting brighter and brighter
body: <p>hey I had this weird problem , I added a subview on Table View and gave it a background color.. When app launches the Color is fine as In the Image </p>
  
  <p><a href="https://i.stack.imgur.com/fA0pc.png" rel="nofollow"><img src="https://i.stack.imgur.com/fA0pc.png" alt="enter image description here"></a></p>
  
  <p>But When I scroll down the cells that are below from the margin are a little brighter then the current cells Like this </p>
  
  <p><a href="https://i.stack.imgur.com/j97a5.png" rel="nofollow"><img src="https://i.stack.imgur.com/j97a5.png" alt="enter image description here"></a></p>
  
  <p>After Scrolling back the first cells become more bright and by scrolling multiple times it become complete White .</p>
  
  <p><a href="https://i.stack.imgur.com/D8Sko.png" rel="nofollow"><img src="https://i.stack.imgur.com/D8Sko.png" alt="enter image description here"></a></p>
  
  <p>Here is the Code of Table view cell</p>
  
  <pre><code>func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell {
  
  
      let cell = tableView.dequeueReusableCellWithIdentifier("newsCell", forIndexPath: indexPath) as! EventsViewCell
  
      let dict = componentsLoaded[indexPath.row] as! NSDictionary
      cell.eventTitle!.text = (dict["news_headline"] as! String)
      cell.backgroundColor = UIColor.clearColor()
      let date_post = dict["news_date"] as! String
      cell.dateLabel!.text = ConvertDate().convertYourDate(date_post)
  
      return cell
  
  }
   func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
  
  
  
      let height = cell.frame.height
     cell.contentView.backgroundColor = UIColor.clearColor()
      let whiteRoundedView : UIView = UIView(frame: CGRectMake(10, 10, self.view.frame.size.width - 20, height ))
  
      red = CGColorCreate(CGColorSpaceCreateDeviceRGB(), [1.0, 1.0, 1.0, 0.3])
      whiteRoundedView.layer.backgroundColor = red
      whiteRoundedView.layer.masksToBounds = false
      whiteRoundedView.layer.cornerRadius = 5.0
      cell.contentView.addSubview(whiteRoundedView)
      cell.contentView.sendSubviewToBack(whiteRoundedView)
  
  }
  </code></pre>