containers(matching:)
Fetches all containers matching the specified predicate.
Declaration
func containers(matching predicate: NSPredicate?) throws -> [CNContainer]Parameters
- predicate:
The predicate to use to fetch matching containers. Set this property to
nilto match all containers.
Return Value
An array of CNContainer objects that match the predicate.
Discussion
A container holds a collection of contacts, and a contact can be in only one container. CardDAV accounts usually have only one container of contacts. Exchange accounts may have multiple containers, where each container represents an Exchange folder.
This method returns an empty array when no matching container is found. In case of an error this method returns nil. You should use only the predicates defined CNContainer class. Compound predicates are not supported.