DetailViewController.swift

override func loadView() {
    self.view = UIView(frame: .zero)
        
    let scrollView: UIScrollView = {
        let scrollView = UIScrollView(frame: .zero)
        scrollView.backgroundColor = .white
        scrollView.translatesAutoresizingMaskIntoConstraints = false
        return scrollView
    }()
    view.addSubview(scrollView)
    NSLayoutConstraint.activate([
        scrollView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
        scrollView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
        scrollView.topAnchor.constraint(equalTo: view.topAnchor),
        scrollView.bottomAnchor.constraint(equalTo: view.bottomAnchor)
    ])
}