leontiy

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

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

leontiy

final class ProductTableViewCell: UITableViewCell {

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

    let viewModel: MutableProperty<Product?>
    var disposable: Disposable?
    
    deinit() {

leontiy

func awakeFromNib() {  
    super.awakeFromNib()
    self.titleLabel.reactive.text <~ self.viewModel.map { $0?.title }
    self.label.reactive.text <~ self.viewModel.map { $0?.text }
    self.imageView.reactive.image <~ self.viewModel.producer.flatMap(.latest) { 
        downloadImage($0.imageUrl).map(Optional.some).prefix(value: nil)
    }
}