WKWebView and UIMenuController

Question

I have an app with a WKWebView in it. In this app, I customize the options presented in the UIMenuController. The web view seems to add Copy and Define options to the menu no matter what I do. If I set myself as first responder and return NO for everything, I still get copy and define options. And I've implemented my own copy option that does special things depending on user preferences and what exactly is selected. Is there a way to remove these extra options?

Update: I've filed this as radar 18487289.

@avdyushin no. But I am at WWDC. Going to ask someone this week. — Tom Hamming
@avdyushin it's a known issue but no timeline. The full fix for now is to hide the menu on willShow and make and present your own with whatever options you want. — Tom Hamming
Thanks, will use UIMenuControllerWillShowMenuNotification notification... — avdyushin
hi guys, any updates on this? I try to call menuVisible=NO UIMenuControllerWillShowMenuNotification but it is not hiding the default copy/define/share... menu — mkto

Jonny Jonny · Accepted Answer · 2017-12-05T15:21:47

For iOS 11, simply subclass WKWebView and override canPerformAction to return false:

class WebView : WKWebView {
    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        return false
    }
}

For iOS 10 or earlier, swizzle WKContentView's canPerformAction method:

@objc private extension UIResponder {
    func swizzle_canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        return false
    }
}

guard let viewClass = NSClassFromString("WKContentView") as? UIView.Type else { return }
method_exchangeImplementations(
    class_getInstanceMethod(viewClass, #selector(UIResponder.canPerformAction))!,
    class_getInstanceMethod(UIResponder.self, #selector(UIResponder.swizzle_canPerformAction))!
)

After remove those web view's build-in menu items, you can add your custom menu items via UIMenuController.shared like normal.

WKWebView and UIMenuController

2 Answers