Swift3 云工具包如何在出错时重新获取记录

云WWDC会在您获得

CKError.changeTokenExpired

时通过将以前的服务器更改令牌设置为nil来重新获取更改。我试过这样的方法：

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

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

---

但是，

选项ByRecordZoneId

已被弃用。那么，如何将上一个服务器令牌传递给服务器，并在错误处理之后继续提取？

您应该在CKFetchRecordZoneChangesOperation（）上使用实例属性configurationsByRecordZoneID

那么：

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