Swift ios check if remote push notifications are enabled in ios9 and ios10

Question

How can I check if the user has enabled remote notifications on ios 9 or ios 10?

If the user has not allowed or clicked No I want to toggle a message asking if they

Answer 1

Even though user doesn't allow the push notifications, the device token is available. So it would be also a good idea to check if it's allowed to receive the push notifications.

private func checkPushNotificationAllowed(completionHandler: @escaping (Bool) -> Void) {
    if #available(iOS 10.0, *) {
        UNUserNotificationCenter.current().getNotificationSettings { (settings) in
            if settings.authorizationStatus == .notDetermined || settings.authorizationStatus == .denied {
                completionHandler(false)
            }
            else {
                completionHandler(true)
            }
        }
    }
    else {
        if let settings = UIApplication.shared.currentUserNotificationSettings {
            if settings.types.isEmpty {
                completionHandler(false)
            }
            else {
                completionHandler(true)
            }
        }
        else {
            completionHandler(false)
        }
    }
}