Xcode 8 Warning “Instance method nearly matches optional requirement”

Question

I converted my (macOS) project to Swift 3 in Xcode 8 and I get the following warnings with several delegate methods I implement in swift classes:

Instance me         


        

Answer 1

Just to add clarification to this rather over complicated workaround: can anyone see why the below is not firing/working when the action is being taken?

extension AppDelegate: UNUserNotificationCenterDelegate {
    @objc(userNotificationCenter:didReceiveNotificationResponse:withCompletionHandler:)
    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) {
        print("RESPONSE FROM NOTIFICATION!")

        switch response.actionIdentifier {
        case "reply":
            print("Reply action received!")
        case "ignore":
            print("Ignore action received!")
        default: print("Error - Unknown action received!")
            break
        }
    }
}