Swift Notification

AppDelegate.swift

// AppDelegate.swift
class AppDelegate: NSObject, UIApplicationDelegate {
    func application(_ application: UIApplication, willFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {
        UNUserNotificationCenter.current().delegate = self
        return true
    }
}

func get_notification_status(completion: @escaping (Bool) -> Void) {
    UNUserNotificationCenter.current().getNotificationSettings { settings in
        DispatchQueue.main.async {
            var status = false
            if settings.authorizationStatus == .notDetermined {
                print("Notification permission is yet to be asked. Go for it!")
            } else if settings.authorizationStatus == .denied {
                print("Notification permission was denied previously. Go to settings & privacy to re-enable the permission.")
            } else if settings.authorizationStatus == .authorized {
                print("Notification permission already granted.")
                status = true
            }
            completion(status)
        }
    }
}

func removeNotifications() {
    let center = UNUserNotificationCenter.current()
    center.getPendingNotificationRequests{ notificationRequests in
        for notificationRequest:UNNotificationRequest in notificationRequests {
            center.removePendingNotificationRequests(withIdentifiers: [notificationRequest.identifier])
        }
    }
}

func scheduleNotification(day: Int) {
    let center = UNUserNotificationCenter.current()
    
    let content = UNMutableNotificationContent()
    content.title = NSLocalizedString("Ödemelerinizi Yaptınız Mı", comment: "")
    content.body = NSLocalizedString("Bu ayın ödemelerini yaptıysanız uygulamayı ziyaret ederek hızlıca kaydedebilirsiniz", comment: "")
    content.sound = UNNotificationSound.default
    
    var dateComp = DateComponents()
    dateComp.day = day;
    dateComp.hour = 14;
    dateComp.minute = 00;
    
    let trigger = UNCalendarNotificationTrigger(dateMatching: dateComp, repeats: true)
    
    let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: trigger)
   
    center.add(request) { error in
        if let error = error {
            print("Error scheduling notification: \(error.localizedDescription)")
        }
    }
}

extension AppDelegate: UNUserNotificationCenterDelegate {
    func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
        // Here we actually handle the notification
        print("Notification received with identifier \(notification.request.identifier)")
        // So we call the completionHandler telling that the notification should display a banner and play the notification sound - this will happen while the app is in foreground
        completionHandler([.banner, .sound])
    }
}