如何在uiscrollview Y位置改变时隐藏/显示uiview？

class ViewController: UIViewController, UIScrollViewDelegate {
    @IBOutlet weak var scrollView: UIScrollView!
    @IBOutlet weak var viewToHide: UIView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        scrollView.delegate = self
    }
    
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let offsetY = scrollView.contentOffset.y
        
        if offsetY > 100 {
            // 超过100时隐藏UIView
            viewToHide.isHidden = true
        } else {
            // 小于等于100时显示UIView
            viewToHide.isHidden = false
        }
    }
}