获取WKWebView中的链接URL

Question

我想获得一个tapped链接的网址WKWebView.链接采用自定义格式,可触发应用中的某些操作.例如http://my-site/help#deeplink-intercom.我这样使用KVO:

override func loadView() {
        let webConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: .zero, configuration: webConfiguration)
        webView.navigationDelegate = self
        webView.addObserver(self, forKeyPath: "URL", options: .new, context: nil)
        view = webView
    }

 override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
        if let newValue = change?[.newKey] {
            print("url changed: \(newValue)")
        }
        print("Did tap!!")
    }

这在第一次点击链接时效果很好.但是,如果我连续两次点击相同的链接,它将不报告链接点击(显然因为实际值没有改变).是否有解决方法来解决这个问题,以便我可以检测每个点击并获取链接？任何关于这个的指针都会很棒!谢谢!

Answer 1

您可以使用WKWebView委托方法.并且不要忘记将webview委托设置为self:webview.navigationDelegate = self

func webView(webView: WKWebView, decidePolicyForNavigationAction navigationAction: WKNavigationAction, decisionHandler: ((WKNavigationActionPolicy) -> Void)) {

    switch navigationAction.navigationType {
        case .LinkActivated:
        if navigationAction.targetFrame == nil {
            self.webView?.loadRequest(navigationAction.request)// It will load that link in same WKWebView
        }
        default:
            break
    }

    if let url = navigationAction.request.URL {
        print(url.absoluteString) // It will give the selected link URL

    }
    decisionHandler(.Allow)
}

Answer 2

addObserver像这样改变

webView.addObserver(self, forKeyPath: "URL", options: [.new, .old], context: nil)

在observeValue功能上你可以获得两个价值

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
    if let newValue = change?[.newKey] as? Int, let oldValue = change?[.oldKey] as? Int, newValue != oldValue {
        //Value Changed
        print(change?[.newKey])
    }else{
        //Value not Changed
        print(change?[.oldKey])
    }
}