title: Xcode: SDWebImage clear cache for single image
body: <p>I'm using <a href="https://github.com/rs/SDWebImage">SDWebImage</a> to asynchronous image downloader with cache support.</p>
  
  <p>It's working perfectly except that sometimes the image got updated on the server with same name, thus I need to clear it from client device cache but no success!</p>
  
  <p>I found <a href="https://github.com/rs/SDWebImage/issues/111">here</a> that I have to use "removeImageForKey" but it's not recognized by Xcode!</p>
  
  <p>I'm using the following code to set the image:</p>
  
  <pre><code>[imgPic setImageWithURL:[NSURL URLWithString:@"http://domain.com/image.jpg"] placeholderImage:[UIImage imageNamed:@"tmpPic.png"]];
  </code></pre>
  
  <p>What's the correct way to call removeImageForKey? What do I have to import rather than UIImageView+WebCache.h?</p>