Change push notifications programmatically in Swift

Question

I have an app where I have implemented push notifications. I check with the user to allow remote notifications with:

let settings = UIUserNotificationSetting         


        

Answer 1

if settings.authorizationStatus != .authorized{

            // Either denied or notDetermined
            // Ask the user to enable it in settings.

            UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .sound, .badge]) {
                (granted, error) in
                  // add your own
                UNUserNotificationCenter.current().delegate = self
                let alertController = UIAlertController(title: appName, message: "Please enable notifications in settings and try again.", preferredStyle: .alert)
                let settingsAction = UIAlertAction(title: "Settings", style: .default) { (_) -> Void in
                    guard let settingsUrl = URL(string: UIApplication.openSettingsURLString) else {
                        return
                    }
                    if UIApplication.shared.canOpenURL(settingsUrl) {
                        UIApplication.shared.open(settingsUrl, completionHandler: { (success) in
                        })
                    }
                }
                let cancelAction = UIAlertAction(title: "Cancel", style: .default, handler: nil)
                alertController.addAction(cancelAction)
                alertController.addAction(settingsAction)
                DispatchQueue.main.async {
                    (UIApplication.shared.delegate as? AppDelegate)?.window?.rootViewController?.present(alertController, animated: true, completion: nil)
                }
            }
        }