您可以使用WKUserScript并将其添加到WKWebView配置的userContentController中。

    let config = WKWebViewConfiguration()
    let source = "document.addEventListener('click', function(){ window.webkit.messageHandlers.iosListener.postMessage('click clack!'); })"
    let script = WKUserScript(source: source, injectionTime: .atDocumentEnd, forMainFrameOnly: false)
    config.userContentController.addUserScript(script)
    config.userContentController.add(self, name: "iosListener")
    webView = WKWebView(frame: UIScreen.main.bounds, configuration: config)

这将制作脚本并将文档加载完成后注入到页面中。现在，您需要实现WKScriptMessageHandler协议以接收消息：

    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        print("message: \(message.body)")
        // and whatever other actions you want to take
    }