title: Reused cell is lagging in refreshing image
body: <p>The main problem here is that I am loading images into a custom cell, and when scrolling, the reused cell shows the old image while loading the new image. </p>
  
  <p>Frankly, there aren't going to be a lot of cells so my first thought was that I could get around using tableView.dequeueReusableCellWithIdentifier but every place I look to try and figure this out either people question why someone would do this, or they simply provide vague advice without some sort of example.</p>
  
  <p>What is the best way to show a cell without this lag in reprocessing the image?</p>
  
  <p><img src="https://i.stack.imgur.com/XpnHx.gif" alt="enter image description here"></p>
  
  <pre><code>class FavoritesPropertyViewCell: UITableViewCell {
      @IBOutlet weak var activityIndicator: UIActivityIndicatorView!
      @IBOutlet weak var cellPropertyImage: UIImageView!
      @IBOutlet weak var cellRoomsValue: UILabel!
      @IBOutlet weak var cellSpaceValue: UILabel!
      @IBOutlet weak var cellPriceRangeValue: UILabel!
      @IBOutlet weak var cellCityStateZipValue: UILabel!
      @IBOutlet weak var cellAddressValue: UILabel!
  
  }
  </code></pre>
  
  <hr>
  
  <pre><code> func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell{         
  
  
              var newPropertyCell: FavoritesPropertyViewCell = tableView.dequeueReusableCellWithIdentifier("FavoritesPropertyCell", forIndexPath: indexPath) as FavoritesPropertyViewCell
  
  //... Get image, format values ...
  
  
                  // Put everything in the labels.
                  newPropertyCell.cellRoomsValue.text = roomsValue
                  newPropertyCell.cellSpaceValue.text = spaceValue
                  newPropertyCell.cellPriceRangeValue.text = priceValue
                  newPropertyCell.cellAddressValue.text = addressValue
                  newPropertyCell.cellCityStateZipValue.text = cityStateZipValue
  
                  return newPropertyCell
  
      }
  </code></pre>