title: AFNetworking: POST request with application/x-www-form-urlencoded
body: <p>I'm learning to use <code>AFNetworking</code>.</p>
  
  <p>I know I can use <code>AFHTTPClient</code> for making a POST request with json.</p>
  
  <p>My question is: is there a way to make a standard POST request (that is, with a content type of <code>application/x-www-form-urlencoded</code>)? My server backend doesn't accept json, because the client should use the same form for login via web.</p>
  
  <p>In past I used <code>ASIHTTPRequest</code> and I used this code:</p>
  
  <pre><code>url = [NSURL URLWithString:@"www.example.org/login/"];
  request = [ASIFormDataRequest requestWithURL:url];
  [request setPostValue:self.username forKey:@"username"];
  [request setPostValue:self.password forKey:@"password"];
  [request startAsynchronous];
  </code></pre>
  
  <p>Thanks!</p>