How to save data correctly when sending multiple GET requests?

Question

Objective-C

Hello! Comrades, help me out!
In general, I have several GET requests. I can not correctly save the data when parsing. Can you please tell me the best way to save?
Tried via dispatch_async but no selenium in that (nothing worked).
I save in homesJSON and roomsJSON.
First did this.

#pragma mark Processing the received response

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
    NSInteger responseStatusCode = [httpResponse statusCode];
    NSLog(@"Код сервера = %li", (long)responseStatusCode);
    
    // получен ответ от сервера
    [_receivedData setLength:0]; // очистка ранее полученных данных
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    // добавляем новые данные к receiveData
    [_receivedData appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    // выполнение операций с полученными данными
    NSLog(@"Обработка полученных данных");
    
    _resultResponse = [[NSString alloc] initWithData:_receivedData encoding:NSUTF8StringEncoding];
    NSLog(@"dataStr = %@", _resultResponse);
    
    _homesJSON = [HomesModel arrayOfModelsFromString:_resultResponse error:nil];
    if (_homesJSON)
        NSLog(@"Data homes saved.");
    
    _roomsJSON = [RoomsModel arrayOfModelsFromString:_resultResponse error:nil];
    if (_roomsJSON)
        NSLog(@"Data rooms saved.");
}

Then I tried using dispatch_async.

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^
                   {
                       [self getRequestHomes];
                       _homesJSON = [HomesModel arrayOfModelsFromString:_resultResponse error:nil];
                       if (_homesJSON)
                           NSLog(@"Data homes saved.");
                   });
    
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^
                   {
                       [self getRequestRooms];
                       _roomsJSON = [RoomsModel arrayOfModelsFromString:_resultResponse error:nil];
                       if (_roomsJSON)
                           NSLog(@"Data rooms saved.");
                   });

Answer 1

Have you tried just using NSURLSession? and NSURLSessionDataTask -
- dataTaskWithRequest:completionHandler: and in the completionHandler block all the necessary parsing

Answer 2

In theory, this should not work at all, because. and the NSURLConnection itself is asynchronous, so you still do an asynchronous dispatch. I would immediately in the dispatcher, that's what I would do

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^
                   {
                       NSString *_resultResponse = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"https://blabla.com/user?id=1"] usedEncoding:NSUTF8StringEncoding error:nil];
                       _homesJSON = [HomesModel arrayOfModelsFromString:_resultResponse error:nil];
                       if (_homesJSON)
                           NSLog(@"Data homes saved.");
                   });

this is in the style of x * yak-x * yak and in production
, and also if you communicate with the server via http, and not via https, then you need to add App Transport Security Settings to Info.plist as in the screenshot