title: want to convert to AFNetworking and have to set setReachabilityStatusChangeBlock to handle reachability and return new controller if not reachable
body: <p>First time using AFNetworking (and also a part-time iOS dev) and have a quick question (and very basic question). How do we use setReachabilityStatusChangeBlock? We have a singleton class called ApiClient that makes all of our calls. </p>
  
  <p>I would think ideally we would want to be setting this in the common method to return the singleton. I see this <a href="https://stackoverflow.com/questions/9411364/afnetworking-afjsonrequestoperation-convert-to-afhttpclient">AFNetworking (AFJSONRequestOperation) convert to AFHTTPClient</a> but honestly, I just don't get where / how we are calling this method.</p>
  
  <p>Secondarily, I'd like to return a non-reachable controller (or provide a way for it to 'redirect' to a non-reachable controller). How would I do this?</p>
  
  <p>thx in advance</p>