检测何时在 WKWebView 中单击 link

Question

如何检测 link 在 WKWebView 中被点击的时间？我正在 UIWebView 中寻找与此等效的内容。

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    if(navigationType == UIWebViewNavigationTypeLinkClicked)
    {

    }
    return YES;
}

我在 WKNavigationDelegate 中尝试过此操作，但即使单击 link，我也只能获得所有请求的 WKNavigationTypeOther。

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    if(navigationAction.navigationType == WKNavigationTypeLinkActivated)
    {

    }
    decisionHandler(WKNavigationActionPolicyAllow);
}

Answer 1

您可以在 WkWebView 中执行以下操作：

override func viewDidLoad() {
    super.viewDidLoad()

     let webView = WKWebView()
     self.view.addSubview(webView) // you need to also setup constraints here - I left out for clarity
     // Make sure you set the delegate, so you get the callback
     self.webView.navigationDelegate = self
}

 // WKWebViewNavigationDelegate
 func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
     guard let url = navigationAction.request.url, let scheme = url.scheme, scheme.contains("http") else {
            // This is not HTTP link - can be a local file or a mailto
            decisionHandler(.cancel)
            return
        }
     // This is a HTTP link
     open(url: url)
     decisionHandler(.allow)
}

在此委托方法中，您将获得 WKWebView 试图打开的 URL 请求。在那里您可以检查 URLRequest 的属性并做出相应的响应。

您甚至可以为 URLRequest 编写处理该逻辑的扩展，以便您可以重用它。

extension URLRequest {
    var isHttpLink: Bool {
        return self.url?.scheme?.contains("http") ?? false
    }
}

那么可以将委托方法中的长条件改成：

 // WKWebViewNavigationDelegate
 func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
   guard navigationAction.request.isHttpLink else {
        decisionHandler(.allow)
        return
    }
   // ... handle url

检测何时在 WKWebView 中单击 link

Detect when a link is clicked in a WKWebView

objective-c

ios

wkwebview