title: Differentiate between NSURLSessions
body: <p>I have a view controller with several methods that fire <code>NSURLSession</code>s.
  Each of them handled by the <code>NSURLDelegate</code>s, for instance</p>
  
  <pre><code>- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask
      didReceiveData:(NSData *)data
  </code></pre>
  
  <p>In this case: How do I know of what method/session the received data is a result? I need to handle the received data differently for each method, since they all return different data.</p>
  
  <p>Preferably, I would get the received data just right back into the associated method.</p>