AFNetworking2.0 raw data returned by the output server

In the process of using AFNetworking2.0, there are times when the operation couldn ' t be completed. (Cocoa error:3840.) Error, after several troubleshooting, found that the data returned by the server is more or less a problem, or server error 404 and so on, this time you need to see what the server returned the original data, the following method is how to output metadata

Locate the file afurlresponseserialization.m in the AFNetworking2.0 directory and add it at line 246

NSLog(@"request:\n%@ \nresponseString:\n%@",response.URL,responseString);

AFNetworking2.0 raw data returned by the output server