我正在WKWebView中加载一个url。leturl=URL(string:"myURL")letrequest=URLRequest(url:url!)webView1.navigationDelegate=selfas!WKNavigationDelegatewebView1.load(request)但是,委托(delegate)函数,funcwebView(_webView:WKWebView,didFinishnavigation:WKNavigation!){print("Finishednavigatingtourl\(webView.url)")}加载完成时不触发。然