title: [__NSCFString absoluteString]: unrecognized selector sent to instance, attempt to convert url to string
body: <p>Looking to simply convert the parse image url to a string so I can use SDWebImage for caching, etc.</p>
  
  <p>After researching I found that I can convert from a url to string by calling absoluteString on the NSURL. I've also tried this:</p>
  
  <pre><code>NSURL *theUrl = [[obj objectForKey:@"image"] url];
  
  
  NSString *finalUrl = [theUrl absoluteString];
  
  [cell.carPhoto setImageWithURL:[NSURL URLWithString:finalUrl]
                             placeholderImage:[UIImage imageNamed:@"placeholder.png"]];
  </code></pre>
  
  <p>but  I am also crashing on this line with the same error</p>
  
  <pre><code>NSString *finalUrl = [theUrl absoluteString];
  </code></pre>
  
  <p>Any ideas? By the way obj is a PFObject</p>