CloudKit Error: Change Token Expired, Reset Needed

Question

Swift3.1，Xcode8.3.3

我一直收到来自 CloudKit 的错误，我不知道该怎么办。

我正在跟踪来自 CloudKit 的通知，如下所示：

let operation = CKFetchNotificationChangesOperation(previousServerChangeToken: previousChangeToken)

//Hold the notification IDs we processed so we can tell CloudKit to never send them to us again
var notificationIDs = [CKNotificationID]()

operation.notificationChangedBlock = { [weak self] notification in
  guard let notification = notification as? CKQueryNotification else { return }
  if let id = notification.notificationID {
    notificationIDs.append(id)
  }
}

operation.fetchNotificationChangesCompletionBlock = { [weak self] newToken, error in
  if let error = error{
    print(error) //<-- <!> This is the error <!>
  }else{
    self?.previousChangeToken = newToken

    //All records are in, now save the data locally
    let fetchOperation = CKFetchRecordsOperation(recordIDs: recordIDs)

    fetchOperation.fetchRecordsCompletionBlock = { [weak self] records, error in
      if let e = error {
        print("fetchRecordsCompletionBlock Error fetching: \(e)")
      }
      //Save records to local persistence...
    }

    self?.privateDB.add(fetchOperation)

    //Tell CloudKit we've read the notifications
    let operationRead = CKMarkNotificationsReadOperation(notificationIDsToMarkRead: notificationIDs)
    self?.container.add(operationRead)
  }
}

container.add(operation)

错误说：

<CKError 0x174241e90: "Change Token Expired" (21/1016); server message = "Error code: RESET_NEEDED"; uuid = ...; container ID = "...">

CKServerChangeTokendocumentation 没有提及任何关于重置令牌的内容，CloudKit 仪表板也没有提供任何此类选项。

知道我应该做什么吗？

Answer 1

此错误代码是 CKErrorCodeChangeTokenExpired，表示您需要重新同步您的更改。

https://developer.apple.com/documentation/cloudkit/ckerror/2325216-changetokenexpired

当更改令牌太旧或容器已重置（重置容器会使旧的更改令牌无效）时返回此错误代码。

与此错误代码相关的注释包括：

（描述代码本身）：

The previousServerChangeToken value is too old and the client must re-sync from scratch

（在各种获取操作 completion/updated 块上）：

If the server returns a CKErrorChangeTokenExpired error, the serverChangeToken used for this record zone when initting this operation was too old and the client should toss its local cache and re-fetch the changes in this record zone starting with a nil serverChangeToken.

CloudKit Error: Change Token Expired, Reset Needed

CloudKit Error: Change Token Expired, Reset Needed

cloudkit

ckfetchnotificationchange

ckerror