title: How to close NSURLConnection
body: <pre><code>    [NSURLConnection sendAsynchronousRequest:request queue:queue  
                             completionHandler:^(NSURLResponse *response,
                              NSData *data, NSError *connectionError) {}
  </code></pre>
  
  <p>How do I close <code>NSURLConnection</code> if I use <code>sendAsynchronousRequest</code> like that ?</p>