Apple designed WKWebView in 2014 to ensure that you can integrate web content into your app quickly, securely, and consistently across iOS and macOS. Since then, we’ve recommended that you adopt WKWebView instead of UIWebView and WebView — both of which were formally deprecated. New apps containing these frameworks are no longer accepted by the App Store. And last year, we announced that the App Store will no longer accept app updates containing UIWebView as of December 2020.
However, to provide additional time for you to adopt WKWebView and to ensure that it supports the features most often requested by developers, this deadline for app updates has been extended beyond the end of 2020. We’ll let you know when a new deadline is confirmed.