AFNetworking parse JSON Unescaped control character

1.Add chandan's method

removeUnescapedCharacter

to class

AFURLResponseSerialization

in AFNetworking 2.0.

2.Add

responseString = [self removeUnescapedCharacter:responseString];

under

NSString *responseString = [[NSString alloc] initWithData:data encoding:stringEncoding];

in method

- (id)responseObjectForResponse:(NSURLResponse *)response
                       data:(NSData *)data
                      error:(NSError *__autoreleasing *)error