Enumeration Case


A policy that saves the record only if the local copy of the record is based on the record still on the server. The server maintains a change tag for each record automatically. When you fetch a record, that change tag is included with the rest of the record’s data. If the change tag in your local record matches the change tag of the record on the server, the save operation proceeds normally. If the server record contains a newer change tag, the record is not saved and an error of type CKErrorServerRecordChanged is reported.


CKRecordSaveIfServerRecordUnchanged = 0