iOS中的WKWebView：如何拦截点击并检索链接的内容？

In a WKWebView, when a user clicks a link that refers to certain file types (e.g. a VCF file for contacts, or an ICS file for calendar events), I'd like to intercept the link, i.e. cancel the navigation, and instead display the content using a specialized view controller., when a user clicks a link that