update(_:)
Updates an existing group in the contact store.
Declaration
func update(_ group: CNMutableGroup)Parameters
- group:
The group to update.
Discussion
The group to be updated must already exist in the contact store. If it does not, the update request fails, the CNErrorCodeRecordDoesNotExist error is thrown, and the CNErrorUserInfoAffectedRecordsKey array is updated to contain that object.