title: Image from URL for Retina Display
body: <p>I have an application that pulls images from an <code>NSURL</code>. Is it possible to inform the application that they are retina ('@2x') versions (the images are of retina resolution)? I currently have the following but the images appear pixelated on the higher resolution displays:</p>
  
  <pre><code>NSURL *url = [NSURL URLWithString:self.imageURL];
  NSData *data = [NSData dataWithContentsOfURL:url];
  UIImage *image = [UIImage imageWithData:data];
  self.pictureImageView.image = image;
  </code></pre>