The calendar interval at which to reschedule the notification.
- iOS 4.0–10.0Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- watchOS 2.0–3.0Deprecated
If you assign a calendar unit such as weekly (
week) or yearly (
year), the system reschedules the notification for delivery at the specified interval. Note that intervals of less than one minute are not supported. The default value is 0, which means that the system fires the notification once and then discards it.