WKWebView disable copy and paste

how can I disable copy and paste in WKWebView?

I have tried overriding the method canPerformAction which is working well in UIWebView, but it does not work on WKWebView

override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
        if action == Selector("copy:") || action == Selector("cut:") || action == Selector("paste:") {
            return false
        }
        return super.canPerformAction(action, withSender: sender)
}

Thanks in advance