title: Parse - imageView as PFFile won't load
body: <p>I don't understand what is going on. I have an image saved as a PFFile in Parse. I can see it and I know it is there. I want to have it as a cell image. The rest of the code below works fine and the memory addresses of PFFile also print. textLabel and detailTextLabel also fine but the images won't show (even if I delete 'loadInBackground'). Any ideas?</p>
  
  <pre><code> override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath, object: PFObject?) -&gt; PFTableViewCell? {
      var cell = tableView.dequeueReusableCellWithIdentifier("Cell") as! PFTableViewCell!
      if cell == nil {
       cell = PFTableViewCell(style: .Subtitle, reuseIdentifier: "Cell")
      }
  
      if let name = object?["name"] as? String {
          cell.textLabel?.text = name
      }
  
      if let artist = object?["artist"] as? String {
          cell.detailTextLabel?.text = artist
      }
  
      if let artwork = object?["artwork"] as? PFFile {
          println("we've got an artwork image \(artwork)")
          //cell!.imageView!.image = UIImage(named: "placeholder.jpg")
          cell.imageView?.file = artwork
          cell.imageView?.loadInBackground()
      }
  
      return cell
  }
  </code></pre>