Handling network responses

HTTPResponse.m

- (void)makeNetworkCall {
  NSURL *URL = nil; // replace with own URL
  [[NSURLSession sharedSession] dataTaskWithURL:URL
                              completionHandler:
   ^(NSData *data, NSURLResponse *response, NSError *error) {
     if (error != nil) {
       NSLog(@"Got error for request with URL: %@", URL);
       [self handleError:error];
       return;
     }
     if (![response isKindOfClass:[NSHTTPURLResponse class]]) {
       NSLog(@"Response class, expected:NSHTTPURLResponse got:%@", [response class]);
       [self handleWrongResponseClassForResponse:response];
       return;
     }
     NSHTTPURLResponse *HTTPResponse = (NSHTTPURLResponse *)response;
     if (HTTPResponse.statusCode != 200) { // Add more acceptable status codes
       NSLog(@"Got non 200 status for request %@", URL);
       [self handleNonOkStatusForResponse:HTTPResponse];
       return;
     }
     if (![response.MIMEType isEqualToString:@"application/json"]) { // Replace with acceptable content type
       NSLog(@"Response type is not what was expected %@", response.MIMEType);
       [self handleIncorrectMIMEForResponse:response];
       return;
     }
     NSDictionary *responseObject = [self parsedObjectFromData:data];
     if (responseObject == nil) {
       NSLog(@"Response data could not be parsed from data: %@", data);
       return;
     }
     [self handleResponseObject:responseObject];
   }];
}