Cloud Kit how to re fetch records when error

Question

Cloud WWDC says When you get a CKError.changeTokenExpired re-fetch changes by setting the previous server change token to nil. I tried something like this:

let operation = CKFetchRecordZoneChangesOperation()
operation.qualityOfService = .userInitiated
operation.recordZoneIDs = appDelegate.changedZoneIDs

let fetchOptions = CKFetchRecordZoneChangesOptions()
fetchOptions.previousServerChangeToken = nil
operation.optionsByRecordZoneID = [ recordZoneID : fetchOptions]

But the optionsByRecordZoneID has been deprecated. So how can I pass the previous server token to the server and continue fetching past the error handling?

Answer 1

You should use the instance property configurationsByRecordZoneID on your CKFetchRecordZoneChangesOperation().

How about:

let operation = CKFetchRecordZoneChangesOperation()
operation.qualityOfService = .userInitiated
operation.recordZoneIDs = appDelegate.changedZoneIDs

let fetchOptions = CKFetchRecordZoneChangesOperation.ZoneConfiguration()
fetchOptions.previousServerChangeToken = nil

var zoneConfiguration: [CKRecordZone.ID : CKFetchRecordZoneChangesOperation.ZoneConfiguration] = [:]
for zoneID in operation.recordZoneIDs {
    zoneConfiguration[zoneID] = fetchOptions
}
operation.configurationsByRecordZoneID = zoneConfiguration