您可以使用WKWebView的navigationDelegate来侦听该操作。您应该实现的委托方法是：
雨燕

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Swift.Void)
{
    let request = navigationAction.request; // Inspect this request to see if it's from Facebook
    let policy = WKNavigationActionPolicyAllow or WKNavigationActionPolicyCancel depending if you want the request to continue firing or not
    decisionHandler( policy );
}

目标-C

- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
{
    NSURLRequest *request = navigationAction.request; // Inspect this request to see if it's from Facebook
    WKNavigationActionPolicy policy = WKNavigationActionPolicyAllow or WKNavigationActionPolicyCancel depending if you want the request to continue firing or not
    decisionHandler( policy );
}