CODEWITHSUNDEEP
iosswift
Yung
Yung

Reputation: 53

UNCalendarNotificationTrigger with start date

I am trying to make a reminder app and I am having a hard time trying to set a start date for my reminders. I am able to make local Notification work with the code below. With this code, I am able to get local notification every Tuesday at the time set by the user (Indicated by the "hour" and "minute").

    if tuesdayIsChecked == true {

        AlarmSupportFileX.tuesdaySelectedBool = true

        hour = hourDateFormatter.string(from: datePicker.date)
        minute = minuteDateFormatter.string(from: datePicker.date)

        var dateComponents = DateComponents()
        dateComponents.weekday = 3
        dateComponents.hour = Int(hour)
        dateComponents.minute = Int(minute)

        print(dateComponents)

        let trigger = UNCalendarNotificationTrigger(dateMatching: dateComponents, repeats: true)
        let requestIdentifier = "\(randomGeneratedString)Tuesday"
        let request = UNNotificationRequest(identifier: requestIdentifier, content: content, trigger: trigger)

        UNUserNotificationCenter.current().add(request, withCompletionHandler: { error in
            //Handle error

        })

    }

My issue is that I only want it to trigger on the Date chosen by user. Example: If I use my code above on 12th Nov 2018 (Monday), a notification will trigger on 13th Nov 2018 (Tuesday) and all the Tuesday that follows.

Assuming user select alarm to trigger on tuesday (dateComponents.weekday = 3).If user set a notification on 12th Nov(Monday) and they selected a start date on 25th Nov(Sunday), I want it to only show the notification on 27th Nov(Tuesday) and all the Tuesday that follows. How can I achieve this?

Upvotes: 1

Views: 1212

Answers (1)

bcye
bcye

Reputation: 845

This is not possible using only UNCalendarNotificationTrigger.

You would need to set up some sort of mechanism for the app to set up that notification the week of the Tuesday.

One way to do this could be:

  1. check if the selected date is this week

-> IF TRUE: register notification

-> IF FALSE: write to UserDefaults the date.

  1. In an didBecomeActive() or viewDidLoad() you could then load the date from UserDefaults and check if the date is in this week, if that's the case, you register the notification.

Upvotes: 1

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