請告訴我，有一個 ios 應用程序，它包含 WebKitView，其中有一個包含以下代碼的站點：<div id="test" style="height: 40px; width: 100px; background-color: powderblue;">Hello</div><script type="text/javascript">document.getElementById("test").addEventListener("click", function () {   window.webkit.messageHandlers.test.postMessage("TEXT");});</script>申請代碼：import UIKitimport WebKitclass ViewController: UIViewController, WKUIDelegate, WKNavigationDelegate, WKScriptMessageHandler {        var webView: WKWebView!        override func loadView() {        webView = WKWebView()        webView.navigationDelegate = self        view = webView    }        override func viewDidLoad() {        super.viewDidLoad()        let url = URL(string: "https://site")!        webView.load(URLRequest(url: url))        let config: WKWebViewConfiguration = WKWebViewConfiguration()        config.userContentController.add(self, name: "test")        webView = WKWebView(frame: self.view.frame, configuration: config)        webView?.navigationDelegate = self        self.webView?.load(URLRequest(url:url))    }        func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {        if message.name == "test", let messageBody = message.body as? String {            print(messageBody)        }    }}在xcode中點擊div時，日志中顯示如下錯誤[general] Connection to daemon was invalidated可能是什么問題呢？對不起我的英語不好。