How to load NSData on another thread?

Question

Objective-C

How to execute the following code in the background so that it does not load the interface?

NSData *data = [NSData dataWithContentsOfURL:url];
    
    _serial.poster = data;

Answer 1

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
       NSData *data = [NSData dataWithContentsOfURL:url];
        
        // если нужно обработать результат в главном потоке
        dispatch_async(dispatch_get_main_queue(), ^{
           _serial.poster = data;
        });

    });