title: How to Add Parameters to Existing NSMutableURLRequest with AFNetworking?
body: <p>I have a NSMutableURLRequest that has been created like so:</p>
  
  <pre><code>AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:&lt;my url&gt;];
  urlRequest = [httpClient requestWithMethod:&lt;my method&gt;
                                        path:&lt;my uri&gt;
                                  parameters:&lt;my parameters&gt;];
  </code></pre>
  
  <p>At some point later in my program, I wish to append additional parameters to the <code>urlRequest</code> (while keeping <strong>everything else unchanged</strong>) before running the network operation. How would I go about doing this?</p>