Subscription Operations

Subscriptions are used to request notifications of specific subsets of data changes.

Topics

Creating Subscriptions

CKDatabaseSubscription

A subscription for database changes.

CKRecordZoneSubscription

A subscription that causes a push notification to fire whenever any change happens in the specified record zone.

Fetching Subscriptions

CKFetchSubscriptionsOperation

An operation used to fetch existing subscriptions from iCloud.

Modifying Subscriptions

CKModifySubscriptionsOperation

An operation for modifying one or more existing subscription objects.

See Also

Notifications and Subscriptions

CKQuerySubscription

The abstract base class for CloudKit subscriptions.

CKRecordZoneNotification

A notification that is triggered by changes to the contents of a record zone.

CKDatabaseNotification

A notification that is triggered by changes to the contents of a database.

Notifications

Notifications are used to inform your application of changes made by another device.