iOS 18 breaks the selector-based way of opening URLs
iOS 18 causes the selector-based way of opening URLs from a keyboard extension without the main application, to stop working. This post describes how KeyboardKit will fix it.
The KeyboardInputViewController has an openURL function that uses a selector to open URLs:
open func openUrl(_ url: URL?) {
let selector = sel_registerName("openURL:")
var responder = self as UIResponder?
while let r = responder, !r.responds(to: selector) {
responder = r.next
}
_ = responder?.perform(selector, with: url)
}
This works great in iOS 17, but in iOS 18 you get the following system log:
BUG IN CLIENT OF UIKIT: The caller of UIApplication.openURL(_:) needs to migrate to the non-deprecated UIApplication.open(_:options:completionHandler:). Force returning false (NO).
Trying to use openURL:options:completionHandler: doesn't seem to work either, which means that there is currently no way to handle the .url keyboard action.
Using openURL:options:completionHandler: doesn’t work either, which means that there is currently no way to handle the .url keyboard action with the controller.
To work around this problem, KeyboardKit 8.8.6 will render .url actions as SwiftUI Links, instead of a view with the full range of button gestures.
To work around this problem with earlier versions of KeyboardKit, use regular Links in your UI and customize the SystemKeyboard/KeyboardView button builder to return a Link for the button content.
You are most welcome to discuss this in this GitHub issue. Perhaps there is a way to make the selector-based approach work once more?
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