Question

Swift 3.1，Xcode 8.3.3

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：

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：

＆lt; CKError 0x174241e90：“更改令牌已过期”（21/1016）;服务器消息 =“错误代码：RESET_NEEDED”; uuid = ...; container ID =“...”＆gt;

CKServerChangeToken documentation未提及有关重置令牌的任何内容，CloudKit仪表板未提供任何此类选项。

知道我应该做什么吗？

Answer 1

此错误代码为CKErrorCodeChangeTokenExpired，表示您需要重新同步更改。

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

当更改令牌太旧或容器已重置（重置容器使旧的更改令牌无效）时，将返回此错误代码。

与此错误代码相关的注释包括：

（描述代码本身）：

previousServerChangeToken值太旧，客户端必须从头开始重新同步

（在各种获取操作完成/更新块上）：

如果服务器返回CKErrorChangeTokenExpired错误，则在执行此操作时用于此记录区域的serverChangeToken太旧，客户端应抛出其本地缓存并从nil serverChangeToken开始重新获取此记录区域中的更改。

CloudKit错误：更改令牌已过期，需要重置

1 个答案: