using KVO to observe WKWebView's URL property not work in iOS 10

Question

I use WKWebView to load my webpage. When user click a button in webpage, my webpage will open a custom schema URL (e.g. asfle://download?media_id=1). And I use KVO to obser

Answer 1

I found the optional solution.I have get same problem and change this line

        webview.addObserver(self, forKeyPath: #keyPath(WKWebView.estimatedProgress), options:.new, context: nil)