How to set up daily local notification for tasks but don't show it when user completes the task before

Question

I know similar questions appeared before but I think I need more clarification since i still don\'t know how to make it done. I\'m a beginner programmer so please forgive me any

Answer 1

I ended up using multiple notifications for each weekday but set it up in little different way:

First set up daily reminder using weekday Int as identifier

func setWeekdayReminder(weekday: Int) {
        let center = UNUserNotificationCenter.current()
        let content = UNMutableNotificationContent()
        content.title = "Daily reminder"
        content.body = "You still have some tasks to complete today."
        content.sound = UNNotificationSound.default
        var dateComponents = DateComponents()
        dateComponents.hour = 18
        dateComponents.minute = 35
        dateComponents.weekday = weekday
        let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true
        let request = UNNotificationRequest(identifier: String(weekday), content: content, trigger: trigger)

        center.add(request) { (error) in
            if let error = error {
                print("Notification Error: ", error)
            }
        }
    }

then i made a function to check if there is any missing day after users launches app (except today, so i won't request todays notification again even after removing it earlier when user completes the task)

func checkDailyReminder() {

       let currentWeekday = Calendar.current.component(.weekday, from: Date())

       center.getPendingNotificationRequests { (requests) in
            var weekdayArray : [Int] = []

            for each in requests {
               weekdayArray.append(Int(each.identifier)!)
            }
            for number in 1...7 {
                if weekdayArray.contains(number) {
                    print("weekdayArray contains weekday \(number)")
                } else {
                    print("weekdayArray doesnt contain weekday \(number)")
                    if number != currentWeekday {
                          self.setWeekdayReminder(weekday: number)
                    }
                }
            }

        }
    }

Of course it's kind of a hack and when user completes the task and somehow won't go back for a week and open it again on the same weekday then he won't get notification that day but it works for rest of the time.