For example, I am working on a Stundenplan, Stundenplan should notify users when there are classes tomorrow or today morning, afternoon and evening. Also notifications should repeat every special weekday if the classes continue for weeks.
Like a alarm alert it is effective to use UNCalendarNotificationTrigger to let notifications repeat under dateComponents‘ constraint.
However, every class has its start date and end date, between them notifications should repeat, but outside shouldn't notify anymore. So it is not rational to generate one repeating notification for every class when classes was added to Stundenplan. Another better solution is needed for this thorny problem.
Many thanks for your kind advices!
