kaspartus

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;
        });

    });

We found that your app requires customers to register with personal information to access non-account-based features, which is not in compliance with the App Store Review Guidelines.

Apps cannot require user registration prior to allowing access to app features and content that are not associated specifically to the user. User registration that requires the sharing of personal information must be optional or tied to account-specific functionality. Additionally, the requested information must be relevant to the features.

@protocol AddControllerDelegate <NSObject>
// здесь передаете то, что было добавлено. если ничего не надо передавать, то без второго параметра
@required
- (void)addController:(AddController *)controller addedObject:(id)object;
@end

@interface AddController : UIViewController
@property (nonatomic, weak) id<AddControllerDelegate> delegate;
@end

// .h
@interface LabelController : UIViewController
@end

// .m

@interface LabelController() <AddControllerDelegate>
@property (nonatomic, weak) IBOutlet UILabel *label;
@end


@implementation LabelController
- (void)prepareForSegue:(UIStoryboardSegue *)segue
{
    if ([segue.identifier isEqualToString:@"your-segue-identifier"]) {
        AddController *addController = segue.destinationController;
        addController.delegate = self;
    }
}

#pragma mark - AddControllerDelegate

- (void)addController:(AddController *)controller addedObject:(id)object
{
    // здесь достаете новый текст label из пришедших данных
    NSString *labelText = [object labelText];

    self.label.text = labelText;
}

@end