title: AFNetworking - saving a downloaded file
body: <p>I am using AFNetworking and can successfully download a file.</p>
  
  <p>At the end of the download, it does not appear in the directory that I set it to be though.</p>
  
  <p>I did some searching and came across a few questions here on SO where it is suggested I use:</p>
  
  <pre><code>[_operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
  </code></pre>
  
  <p>But that comes up with an error and it is as far as I can tell not mentioned in their documentation.</p>
  
  <p>the error is :</p>
  
  <blockquote>
    <p>/Users/Jeff/Documents/Dropbox-01/Dropbox/Xcode Projects/Try Outs - JEFF/testDownload/testDownload/JWKDownloadViewController.m:177:10: No visible @interface for 'AFURLConnectionOperation' declares the selector 'setCompletionBlockWithSuccess:failure:'</p>
  </blockquote>
  
  <p><strong>Is there an updated line I need to use???</strong></p>