-(void)viewDidLoad {
    [super viewDidLoad];
    // Configure self's view
    self.view.backgroundColor = [UIColor blackColor];
    // Configure subviews
    UIImageView *imageView = [[UIImageView alloc]
        initWithFrame:self.view.bounds];
RAC(imageView, image) = [RACObserve(self.photoModel, fullsizedData) map:^id(id value) {
return [UIImage imageWithData:value];
    }];
    imageView.contentMode = UIViewContentModeScaleAspectFit;
    [self.view addSubview:imageView];
    self.imageView = imageView;
}