title: UISwipeGesture on imageView within tableView not working
body: <p>I'm trying to add a swipe <code>gesture(left/right)</code> on an <code>UIImageView</code> within my <code>tableViewCell</code>. I have everything working, however, i'm having trouble when I <code>swipe(left/right)</code> the image show change. </p>
  
  <p>Here's my code to add my swipe gesture to my within <code>CellForRowAtIndexPath</code></p>
  
  <pre><code>resultsImageFileOne[indexPath.row].getDataInBackgroundWithBlock{
  (imageOneData: NSData?, error: NSError?) -&gt; Void in
  
    if error == nil {
        let imageOne = UIImage(data: imageOneData!)
        //cell.imageView.image = imageOne &lt;- will set image to UIImageView
  
        self.pictureOne = imageOne //global
    }
  }
  
  resultsImageFileTwo[indexPath.row].getDataInBackgroundWithBlock {
  (imageTwoData: NSData?, error: NSError?) -&gt; Void in
  
    if error == nil {
        let imageTwo = UIImage(data: imageTwoData!)
        //cell.imageView.image = imageTwo &lt;- will set image to UIImageView
  
        self.pictureTwo = imageTwo //global
    }
  }
  
   var swipeLeft = UISwipeGestureRecognizer(target: self, action: "swipeImage:")
   swipeLeft.direction = UISwipeGestureRecognizerDirection.Left
  
   var swipeRight = UISwipeGestureRecognizer(target: self, action: "swipeImage:")
   swipeRight.direction = UISwipeGestureRecognizerDirection.Right
  
   cell.mainDrawView.addGestureRecognizer(swipeLeft)
   cell.mainDrawView.addGestureRecognizer(swipeRight)
  </code></pre>
  
  <p>My <code>Selector method</code>: it prints out the correct direction except that I can't change the image that is inside the cell from this outside method. When a swipe happens it crashes saying it found nil.</p>
  
  <pre><code>func swipeImage(sender: UISwipeGestureRecognizer){
  
  var newCell: tableViewCell = tableViewCell()
  
  if (sender.direction == .Left){
      println("Swiped Left")
  
  //change image in TableViewCell
  newCell.imageView.image = pictureOne
  }
  if (sender.direction == .Right){        
     println("Swiped Right")
     //change image in TableViewCell
     newCell.imageView.image = pictureOne
    }
  }
  </code></pre>