UNTimeIntervalNotificationTrigger
A trigger condition that causes the system to deliver a notification after the amount of time you specify elapses.
Declaration
class UNTimeIntervalNotificationTriggerOverview
Create a UNTimeIntervalNotificationTrigger object when you want to schedule the delivery of a local notification after the number of seconds you specify elapses. You use this type of trigger to implement timers.
Listing 1 creates a trigger that delivers its notification one time after 30 minutes have elapsed.
Listing 1. Creating a trigger that fires in 30 minutes