title: AFNetworking - Invalid parameter not satisfying: url
body: <p>I just tried AFNetworking on ios7 and i get this error: </p>
  
  <pre><code>    /Classes/AFHTTPClient.m:227
   2013-09-16 18:25:57.557 App[13531:a0b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: url
  </code></pre>
  
  <p>I don't know what's going on, is there an issue with the lib an ios7 ?
  thanks.</p>