Swift cloudkit CKFetchRecordZoneChangesOptions无法返回删除记录

Question

我不知道为什么我不能在CKFetchRecordZoneChangesOptions上得到任何删除记录，我可以创建和修改记录，但delete只是无法删除记录。
昨天我可以正常得到删除更改记录。

这里是我的代码

public func handleNotification(whichNotification : Int) { 

    zoneID = UserDataCustomZone.zoneID 

    if #available(iOS 10.0, *) { 

     // Use the ChangeToken to fetch only whatever changes have occurred since the last 
     // time we asked, since intermediate push notifications might have been dropped. 
     var changeToken: CKServerChangeToken? = nil 
     let changeTokenData = UserDefaults.standard.data(forKey: serverChangeTokenKey) 

     if changeTokenData != nil { 
      changeToken = NSKeyedUnarchiver.unarchiveObject(with: changeTokenData!) as! CKServerChangeToken? 
     } 

     let options = CKFetchRecordZoneChangesOptions() 
     options.previousServerChangeToken = changeToken 
     let optionsMap = [zoneID!: options] 
     let operation = CKFetchRecordZoneChangesOperation(recordZoneIDs: [zoneID!], optionsByRecordZoneID: optionsMap) 
     operation.fetchAllChanges = true 
     // only can receive created and modified change record 
     operation.recordChangedBlock = { record in 
      //show record 
      print("check this out \(record)") 

      } 

    } 

    operation.recordZoneChangeTokensUpdatedBlock = { zoneID, changeToken, data in 

     print("print Token \(String(describing: changeToken))") 

     guard let changeToken = changeToken else { 
      return 
     } 

     let changeTokenData = NSKeyedArchiver.archivedData(withRootObject: changeToken) 
     UserDefaults.standard.set(changeTokenData, forKey: self.serverChangeTokenKey) 
    } 

    operation.recordZoneFetchCompletionBlock = { zoneID, changeToken, data, more, error in 
     guard error == nil else { 
      return 
     } 
     guard let changeToken = changeToken else { 
      return 
     } 

     let changeTokenData = NSKeyedArchiver.archivedData(withRootObject: changeToken) 
     UserDefaults.standard.set(changeTokenData, forKey: self.serverChangeTokenKey) 
    } 

    operation.fetchRecordZoneChangesCompletionBlock = { error in 
     guard error == nil else { 
      return 
     } 
    } 

    operation.qualityOfService = .utility 

    let container = CKContainer.default() 
    let db = container.privateCloudDatabase 
    db.add(operation) 

    } else { 
     // Fallback on earlier versions 
    } 

} 

Answer 1

我注意到你定义了一个recordZoneChangeTokensUpdatedBlock处理程序，这是足以让接收记录的创造和更新。但是，CKFetchRecordZoneChangesOperation通过其recordWithIDWasDeletedBlock处理程序通知记录删除。该声明是：

var recordWithIDWasDeletedBlock: ((CKRecordID, String) -> Void)? { get set }

所以，基本上你需要包含以下额外的线路：

operation.recordWithIDWasDeletedBlock = { recordID, recordType in ... }

在原始代码。

请参阅Apple developer documentation以供参考。

整个过程和参考代码可在Fetching Changes章节Maintaining a Local Cache of CloudKit Records的CloudKit Quick Start指南中找到。