Download and save image with AFNetworking on iOS

Download and save image with AFNetworking on iOS

 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString: url]];
                                              AFHTTPRequestOperation *requestOperation = [[AFHTTPRequestOperation alloc] initWithRequest: request];
                                              requestOperation.responseSerializer = [AFImageResponseSerializer serializer];
                                              [requestOperation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
                                                  //NSLog(@"Response: %@", responseObject);
                                                  
                                                  
                                                  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
                                                  NSString *documents = [paths objectAtIndex:0];
                                                  NSString *finalPath = [documents stringByAppendingPathComponent: fn];
                                                  [[operation responseData] writeToFile:finalPath atomically:YES];
                                              } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
                                                  NSLog(@"Image error: %@ - %@", error, url);
                                              }];
                                              [requestOperation start];