EventKit watchOS 5.3 to 6.0 API Differences
EKError.h
Added
EKErrorInvalidInviteReplyCalendar
Added
EKErrorNotificationsCollectionFlagNotSet
Added
EKErrorSourceMismatch
Added
EKErrorNotificationCollectionMismatch
Added
EKErrorNotificationSavedWithoutCollection
EKEventStore.h
Added
EKEventStore.delegateSources