title: Lazy load images in UITableView
body: <p>I have some 50 custom cells in my <code>UITableView</code>. I want to display an   image and a label in the cells where I get the images from URLs.</p>
  
  <p>I want to do a lazy load of images so the UI does not freeze up while  the images are being loaded. I tried getting the images in separate threads but I have to load each image every time a cell becomes visible again (Otherwise reuse of cells shows old images). Can someone please tell me how to duplicate this behavior.</p>