I have a question on which is best way or the correct way to send AFNetworking results to controller. Is it via delegate or notification?

I created a class to handle make API calls that has the code below. So if imported this class to another controller and call this method to make API call. Should I do delegate or notification?

I have read [www.raywenderlich.com/59255/afnetworking-2-0-tutorial](http://www.raywenderlich.com/59255/afnetworking-2-0-tutorial) and it is using delegates. I also been watched CodeSchool tutorial, which they used notification from Model to Controller. 

I added the code below in a hope to better show my question.

```
AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc] initWithBaseURL:baseURL];

// notification way inside the BLOCK
[ manager GET:path parameters:params
     success:^(NSURLSessionDataTask *operation, id responseObject) {
         [ [NSNotificationCenter defaultCenter] postNotificationName:notificationName
                                                              object:nil
                                                            userInfo:responseObject ];

     } failure:^(NSURLSessionDataTask *operation, NSError *error) {
         [ [NSNotificationCenter defaultCenter] postNotificationName:notificationName
                                                              object:nil ];
     }];

// delegate way inside the BLOCK
[ manager GET:path parameters:params
     success:^(NSURLSessionDataTask *operation, id responseObject) {

       if ([delegate respondsToSelector:@selector(getUserFeedsDidFinish:resultDict:)])
       {
            [delegate performSelector:@selector(getUserFeedsDidFinish:resultDict:) withObject:self withObject:resultDict];
       }

     } failure:^(NSURLSessionDataTask *operation, NSError *error) {
       if ([delegate respondsToSelector:@selector(getUserFeeds:didFailWithResultDict:)]) {
           [delegate performSelector:@selector(getUserFeeds:didFailWithResultDict:)
                          withObject:self
                          withObject:[NSDictionary dictionaryWithObject:error.userInfo forKey:KEY_ERRORS]];
        }
     }];

```