如何在WkWebView中检测反向滑动

import UIKit
import WebKit

class ViewController: UIViewController, UIScrollViewDelegate {

    var webView: WKWebView!
    var lastContentOffset: CGFloat = 0

    override func viewDidLoad() {
        super.viewDidLoad()

        // 创建WkWebView
        let configuration = WKWebViewConfiguration()
        webView = WKWebView(frame: view.bounds, configuration: configuration)
        webView.scrollView.delegate = self
        view.addSubview(webView)

        // 加载网页
        let url = URL(string: "https://www.example.com")
        let request = URLRequest(url: url!)
        webView.load(request)
    }

    // 滚动监听器
    func scrollViewDidScroll(_ scrollView: UIScrollView) {
        let currentOffset = scrollView.contentOffset.y

        if currentOffset < lastContentOffset {
            // 用户向下滑动，执行反向滑动操作
            print("用户进行了反向滑动")
            // 可以在这里添加相应的逻辑
        }

        lastContentOffset = currentOffset
    }
}