Swift cloudkit CKFetchRecordZoneChangesOptions無法返回刪除記錄

Question

我不知道爲什麼我不能在CKFetchRecordZoneChangesOptions上得到任何刪除記錄，我可以創建和修改記錄，但delete只是無法刪除記錄。
昨天我可以正常得到刪除更改記錄。

這裏是我的代碼

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

我注意到你定義了一個recordZoneChangeTokensUpdatedBlock處理程序，這是足以讓接收記錄的創造和更新。但是，CKFetchRecordZoneChangesOperation通過其recordWithIDWasDeletedBlock處理程序通知記錄刪除。該聲明是：

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

所以，基本上你需要包含以下額外的線路：

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

在原始代碼。

請參閱Apple developer documentation以供參考。

整個過程和參考代碼可在Fetching Changes章節Maintaining a Local Cache of CloudKit Records的CloudKit Quick Start指南中找到。