title: Proper way to add subview to UITableViewCell contentView
body: <p>In my application i need to display multiple images in a UITableView,so i've already searched a lot in the web for the proper way to load large images to UITableViewCells,to be more clearly i'll divide the procedure that my app execute:</p>
  
  <ol>
  <li>Download images asynchronous;</li>
  <li>Save them to NSHomeDirectory();</li>
  </ol>
  
  <p>=> Thins part is working perfectly.</p>
  
  <p>The problem is,how to display the images in the UITableViewCell,i've already tried to add UIImageView's to the cell contentView but the scrolling performance were a bit affected,i've searched on Apple guides and i believe the correct way is adding UIImageView's to the cell and loading the images from NSHomeDirectory(),so:</p>
  
  <p><strong>What's the best way to customize a UITableViewCell and add the UIImageView's(302x302px) to it?</strong></p>