Update data in Table View after user received push notification - swift

Question

I have an app with push notifications and RealmDB. User himself chooses the date of notifications after that the notification date goes to the RealmDB. Every time a user receives a notification, the date of the next notification changes, and the user can see the date in Table View. Problem is...after the user has received the notification, he goes to the application through the push notification so func doesn't work. If user go to app by open it - everything is OK.
In cellForRowAt:
center.getDeliveredNotifications { (notifications) in
for notification:UNNotification in notifications {
print(notification.request.identifier)
if (notification.request.identifier == timeId){
let today = notification.date
let realNextDate = Calendar.current.date(byAdding: .day, value: timeInterval!, to: today)
let realm = try! Realm()
try! realm.write {
for plants in realm.objects(MyPlant.self).filter("id == %#", timeId as Any) {
plants.nextDate = realNextDate
plants.prevDate = today
}
}
}
}
}

Answer 1

The reason behind this I believe is that you are configuring Realm in the AppDelegate with
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
return true
}
This is what is executed when you open the app by tapping on the App icon. In the case where you open the app by tapping the push notification, the above AppDelegate method isn't executed. Instead a method shown below is executed,
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
// unused
}
Due to this, you will have to do some configurations in this method as well for it to work when tapped on the notification.