用户内容控制器从未从JS注入回调

我遇到WBWebview遇到NSPopover
我遵循this指南,以便能够将数据从JS发送回我的SWIFT应用程序。 遗憾的是,SWIFT应用程序从未调用过userContentController。 以下是我的SWIFT应用程序查看控制器代码:

class GSViewController: NSViewController, WKScriptMessageHandler, WKNavigationDelegate {

    var webView: WKWebView?

    var webConfig:WKWebViewConfiguration {
        get {

            // Create WKWebViewConfiguration instance
            let webCfg:WKWebViewConfiguration = WKWebViewConfiguration()

            // Setup WKUserContentController instance for injecting user script
            let userController:WKUserContentController = WKUserContentController()

            // Add a script message handler for receiving  "buttonClicked" event notifications posted from the JS document using window.webkit.messageHandlers.buttonClicked.postMessage script message
            userController.addScriptMessageHandler(self, name: "buttonClicked")

            // Get script that's to be injected into the document
            let js:String = buttonClickEventTriggeredScriptToAddToDocument()

            // Specify when and where and what user script needs to be injected into the web document
            let userScript:WKUserScript =  WKUserScript(source: js, injectionTime: WKUserScriptInjectionTime.AtDocumentEnd, forMainFrameOnly: false)

            // Add the user script to the WKUserContentController instance
            userController.addUserScript(userScript)

            // Configure the WKWebViewConfiguration instance with the WKUserContentController
            webCfg.userContentController = userController;

            return webCfg;
        }
    }

    override func loadView() {
        super.loadView()
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        self.webView = WKWebView(frame: self.view.frame, configuration: webConfig)
        self.webView!.navigationDelegate = self
        self.view = webView!

        let username = NSUserName()
        let url = NSURL(string:"someUrl")
        let req = NSURLRequest(URL:url!)
        self.webView!.loadRequest(req)
        self.view.frame = CGRectMake(0, 0, 440, 600)
     }

    func buttonClickEventTriggeredScriptToAddToDocument() ->String{
        let script:String = "webkit.messageHandlers.callbackHandler.postMessage('Does it works?');"
        return script;

    }

    // WKNavigationDelegate
    func webView(webView: WKWebView, didFinishNavigation navigation: WKNavigation!) {
        NSLog("%s", #function)
    }

    func webView(webView: WKWebView, didFailNavigation navigation: WKNavigation!, withError error: NSError) {
        NSLog("%s. With Error %@", #function, error)
        showAlertWithMessage("Failed to load file with error (error.localizedDescription)!")
    }

    func userContentController(userContentController: WKUserContentController, didReceiveScriptMessage message: WKScriptMessage) {
        print("called")
        if(message.name == "callbackHandler") {
            print("It does ! (message.body)")
        }
    }

    // Helper
    func showAlertWithMessage(message:String) {
        let myPopup:NSAlert = NSAlert()
        myPopup.messageText = message
        myPopup.alertStyle = NSAlertStyle.WarningAlertStyle
        myPopup.addButtonWithTitle("OK")
        myPopup.runModal()
    }

}

我正在尝试直接注入对SWIFT回调的调用webkit.messageHandlers.callbackHandler.postMessage('Does it works?');,但似乎不起作用。

通过不同的测试,我发现注入实际上是以Swift->JS的方式工作的(我已经能够通过注入JQuery代码修改可见的HTML元素的CSS),但JS->SWIFT桥似乎就是做不到这一点。 有人知道为什么吗?

我使用的是OSX 10.11.6,运行的是XCode 7.3.6。

总的来说,我对Swift和OSX编程真的很陌生,所以请毫不犹豫地指出我遗漏的任何元素。我自愿省略了我的页面使用的JS,因为我在示例中没有使用任何JS。

谢谢。


解决方案

找到了,完全是我的错。 将脚本添加到Webview配置时,我忘记重命名消息处理程序。

userController.addScriptMessageHandler(self, name: "callbackHandler") // was originally "ButtonClicked"

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