ios 拦截js请求参数值

import WebKit

class ViewController: UIViewController, WKNavigationDelegate {
    var webView: WKWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let configuration = WKWebViewConfiguration()
        webView = WKWebView(frame: view.bounds, configuration: configuration)
        webView.navigationDelegate = self
        view.addSubview(webView)
        
        if let url = URL(string: "https://example.com") {
            let request = URLRequest(url: url)
            webView.load(request)
        }
    }

    func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        if let url = navigationAction.request.url {
            // 检查并修改URL参数
            var components = URLComponents(url: url, resolvingAgainstBaseURL: true)
            if let queryItems = components?.queryItems {
                var newQueryItems = queryItems.map { (item) -> URLQueryItem in
                    if item.name == "paramToModify" {
                        return URLQueryItem(name: item.name, value: "newValue")
                    }
                    return item
                }
                components?.queryItems = newQueryItems
                navigationAction.request.url = components?.url
            }
        }
        decisionHandler(.allow)
    }
}