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MBSSep2018MunichDE
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CKRecordZoneMBS class

Type Topic Plugin Version macOS Windows Linux Console & Web iOS
class CloudKit MBS Mac64bit Plugin 16.5 Yes No No Yes, macOS only No
Function: A definition of a custom area for organizing related records in a database.
Notes:
Zones are an important part of how you organize your data. The public and private databases have a single default zone. In the private database you can use CKRecordZoneMBS objects to create additional custom zones as needed. Use custom zones to arrange and encapsulate groups of related records in the private database. Custom zones support other capabilities too, such as the ability to write multiple records as a single atomic transaction.

Treat each custom zone as a single unit of data that is separate from every other zone in the database. Inside the zone, you add records as you would anywhere else. You can also create links between the records inside a zone by using the CKReferenceMBS class. However, the CKReferenceMBS class does not support cross-zone linking, so each reference object must point to a record in the same zone as the current record.

Use the CKRecordZoneMBS class as-is and do not subclass.

Creating a Custom Record Zone
For the most part, you use instances of this class to create and manage custom zones. Although you can use this class to retrieve a database’s default zone, most operations act on records in the default zone by default, so you rarely need to specify it explicitly.

To create a custom zone, use CKRecordZoneMBS to create the zone object, and then save that zone to the user’s private database using a CKModifyRecordZonesOperationMBS object. You cannot save any records in the zone until you save it to the database. When creating records, explicitly specify the zone ID if you want the records to reside in a specific zone; otherwise, they will be saved to the default zone. You cannot create custom zones in a public database.

After creating a CKRecordZoneMBS object and saving it to the database, you do not interact with the object much. Instead, most interactions occur with its associated CKRecordZoneIDMBS object, which you use to refer to the zone when creating records.

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Capabilities

Constant Value Description
CapabilityAtomic 2 A capability that allows changes to multiple records to be made atomically.

When you use a CKModifyRecordsOperationMBS object to save records, if the server is unable to save the changes for one record, it does not save the changes for any of the records. When combined with the CKRecordSaveIfServerRecordUnchanged policy of the operation object, this behavior prevents your app from overwriting changes to a group of records if one of the records was modified elsewhere.
CapabilityFetchChanges 1 A capability that allows you to fetch only the changed values in records.

This capability makes the creation of offline caches more efficient. Instead of fetching the entire record every time, use a CKFetchRecordChangesOperationMBS object to fetch only the values that changed, and use the returned data to update your caches. Doing so minimizes the amount of data you receive from the server. You can still fetch the entire record using a CKFetchRecordsOperationMBS object if you want.
CapabilitySharing 4 Sharing

This class has no sub classes.

Some methods using this class:

Some events for this class:


The items on this page are in the following plugins: MBS Mac64bit Plugin.


CKRecordZoneIDMBS   -   CKRecordZoneNotificationMBS





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