Find list of Local Notification the app has already set

Question

My app allows users to set a number of reminders in the future. When the app lauches I want to know what reminders (notifications) have already been set.

Can I read

Answer 1

Swift 4

UNUserNotificationCenter.current().getPendingNotificationRequests(completionHandler: { (requests) in

    for request in requests {

        if request.identifier == "IDENTIFIER YOU'RE CHECKING IF EXISTS" {

            //Notification already exists. Do stuff.

        } else if request === requests.last {

            //All requests have already been checked and notification with identifier wasn't found. Do stuff.

        }
    }
})

I used this to fix a bug where the same weekly notification was already set and being set again when the app would open, so it would keep resetting the timer to appear, which means it never did appear.