记一个swift UIscreen界面问题

class CustomerController: BaseViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
       
        setupUI（）
    }

     override func setupUI() {

        let scrollView = UIScrollView(frame: self.view.bounds)
        scrollView.isScrollEnabled = true
        scrollView.contentSize = CGSize(width: UIScreen.cz_screenWidth(), height: UIScreen.cz_screenHeight()*2)
        scrollView.showsHorizontalScrollIndicator = false
        scrollView.showsVerticalScrollIndicator = true
        scrollView.scrollsToTop = true
      
        self.view.addSubview(scrollView)
    }
」