title: How to use Progress parameter in AFNetworking 2.0
body: <p>I am trying to use AFNetworking 2.0 with NSURLSession. I am using the method </p>
  
  <pre><code>- (NSURLSessionUploadTask *)uploadTaskWithRequest:(NSURLRequest *)request
                                           fromFile:(NSURL *)fileURL
                                           progress:(NSProgress * __autoreleasing *)progress
                                  completionHandler:(void (^)(NSURLResponse *response, id responseObject, NSError *error))completionHandler;
  </code></pre>
  
  <p>How am I supposed to use the progress parameter. The method is a non blocking method. Hence I will have to listen to the '<code>progress</code>' to get the updates. But the parameter wouldn't take a property. Only takes a local variable(NSProgress * <strong>__autoreleasing</strong> *). I can't add KVO to a local var. </p>
  
  <p>I am not really sure how to use.</p>