title: AFNetworking - do not cache response
body: <p>I'm using this code to pull a simple JSON feed from a server:</p>
  
  <pre><code>AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
      manager.responseSerializer = [AFJSONResponseSerializer serializer];
  
  [manager GET:kDataUrl parameters:nil
   success:^(AFHTTPRequestOperation *operation, id responseObject) {
       NSLog(@"response: %@", responseObject);
   }
   failure:^(AFHTTPRequestOperation *operation, NSError *error) {
       NSLog(@"JSON DataError: %@", error);
   }];
  </code></pre>
  
  <p>It works. However, after I change the JSON file at <code>kDataUrl</code>, and verify that the change is made in a browser, when I run the app again, I still get the previous response.</p>
  
  <p>It seems that AFNetworking is somehow caching the old response. I do not want this behavior. I want to download the current feed. Is there some kind of setting or parameter I need to set to turn off caching?</p>