override func viewDidLayoutSubviews() {

    // Add the logo hd background image and apply blur effect
    // in viewDidLayoutSubviews, the blur effect is correctly done after changing the orientation of the iPhone

    let backgroundImage = UIImage(named: "logo-hd")
    let imageView = UIImageView(image: backgroundImage)
    self.tableView.backgroundView = imageView
    tableView.backgroundView?.contentMode = .scaleAspectFit

    let blurEffect = UIBlurEffect(style: UIBlurEffect.Style.light)
    let blurView = UIVisualEffectView(effect: blurEffect)
    blurView.frame = imageView.bounds
    imageView.addSubview(blurView)
}