agee

objectManager = [[RKObjectManager alloc] initWithHTTPClient:afHttpClient];

RKResponseDescriptor *characterResponseDescriptor =
    [RKResponseDescriptor responseDescriptorWithMapping:objectMapping
                                                 method:RKRequestMethodGET
                                            pathPattern:pathPattern
                                                keyPath:@"data.results" // <- путь к JSON-массиву
                                            statusCodes:[NSIndexSet indexSetWithIndex:200]];
    
    [objectManager addResponseDescriptor:characterResponseDescriptor];

[objectManager getObjectsAtPath:path
                                           parameters:queryParams
                                              success:success
                                              failure:failure];

- (void)viewDidLoad {
    [super viewDidLoad];    
    ImageTouched *instance = [[ImageTouched alloc] initWithFrame:CGRectMake(0, 0, 50, 50)];
    [self.view addSubview:instance];
    // Подписываемся на уведомление
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(imageDidTouch:) name:@"ImageTouchedImageDidTouch" object:nil];
}

// Метод, который обрабатывает уведомление
- (void)imageDidTouch:(NSNotification *)notification {
    if ([notification.object isKindOfClass:[ImageTouched Class]])
        NSLog(@"Pew value is %@", ((ImageTouched *)notification.object).pew);
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"Image Touched");
    self.pew = @"pewpewpewew";  
    // Отправить уведомление, отправляя самого себя в качестве параметра object
    [[NSNotificationCenter defaultCenter] postNotificationName:@"ImageTouchedImageDidTouch" object:self];
}