我无法在WKWebview中获得网页的某个按钮的单击事件，如何使用java脚本将单击事件添加到wkwebview

import WebKit

let webView = WKWebView(frame: CGRect(x: 0, y: 0, width: 320, height: 480))
let url = URL(string: "https://example.com")
let request = URLRequest(url: url!)
webView.load(request)

let script = WKUserScript(source: "document.getElementById('buttonId').addEventListener('click', function() { window.webkit.messageHandlers.buttonClicked.postMessage('Button clicked'); });", injectionTime: .atDocumentEnd, forMainFrameOnly: true)

let configuration = WKWebViewConfiguration()
configuration.userContentController.addUserScript(script)

configuration.userContentController.add(self, name: "buttonClicked")

extension ViewController: WKScriptMessageHandler {
    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        if message.name == "buttonClicked" {
            if let messageBody = message.body as? String {
                print("Button clicked: \(messageBody)")
            }
        }
    }
}

let webView = WKWebView(frame: CGRect(x: 0, y: 0, width: 320, height: 480), configuration: configuration)