rac-naive.swift

// View Model layer
final class Product {
    let title: String
    let text: String
    let imageUrl: URL
    // ...  
}

// Networking layer
func downloadImage(url: URL) -> SignalProducer<UIImage, NSError> {
    // ...
}

// View layer
final class ProductTableViewCell: UITableViewCell {

    @IBOutlet var label: UILabel!
    @IBOutlet var titleLabel: UILabel!
    @IBOutlet var imageView: UIImageView!

    let viewModel: MutableProperty<Product?>
    
    func awakeFromNib() {  
        super.awakeFromNib()
        self.viewModel.producer.startWithValues { [weak self] maybeAViewModel in
            if let aViewModel = maybeAViewModel {
                self?.titleLabel.text = aViewModel.title
                self?.label.text = aViewModel.text
                downloadImage(aViewModel.imageUrl).startWithValues { [weak self] anImage in
                    self?.imageView.image = anImage
                }
            }
        }
    }
    
}