title: AFNetworking and No Internet Connection scenario
body: <p>I use <code>AFNetworking</code> in my app for every request (like login, get data from url, etc).</p>
  
  <p>Take this for example: an user click on the login button and there's no connection, how to instantly display a <code>UIAlertView</code> that says the error? The <strong>only</strong> way is to wait the request timeout and execute the <code>failure</code> block? Isn't there a way that instantly check if there's connection or not?</p>
  
  <p>Thanks!</p>