Ios 如何使用previousServerchangetoken初始化CKFetchRecordZoneChangesOperation?
我正在从CloudKit服务器获取记录更改,但每次都出现错误 [LogFacilityCK]获取操作E0367CA861DAF5A9的连接错误: 错误域=NSCOCAERRORDOMAIN Code=4097“连接到名为的服务” com.apple.cloudd“UserInfo={NSDebugDescription=与服务的连接 命名为com.apple.cloudd} 我知道原因,因为我错误地初始化了CKFetchRecordZoneChangesOperation 请检查以下代码并更正我:Ios 如何使用previousServerchangetoken初始化CKFetchRecordZoneChangesOperation?,ios,iphone,xcode,objective-c-blocks,cloudkit,Ios,Iphone,Xcode,Objective C Blocks,Cloudkit,我正在从CloudKit服务器获取记录更改,但每次都出现错误 [LogFacilityCK]获取操作E0367CA861DAF5A9的连接错误: 错误域=NSCOCAERRORDOMAIN Code=4097“连接到名为的服务” com.apple.cloudd“UserInfo={NSDebugDescription=与服务的连接 命名为com.apple.cloudd} 我知道原因,因为我错误地初始化了CKFetchRecordZoneChangesOperation 请检查以下代码并更正我
CKFetchRecordZoneChangesOperation *operation = [[CKFetchRecordZoneChangesOperation alloc]initWithRecordZoneIDs:@[ recordZoneID ] optionsByRecordZoneID:@{@"Zone":recordZoneID,@"FetchRecordZoneChangesOptions":option}];
我需要这方面的帮助:
**@{@"Zone":recordZoneID,@"FetchRecordZoneChangesOptions":option}];**
只需创建变量:
var serverChangeToken: CKServerChangeToken? {
guard let encoded = UserDefaults(suiteName: SharedGroupName)?.data(forKey: ServerChangeTokenKey) else {
return nil
}
return NSKeyedUnarchiver.unarchiveObject(with: encoded) as? CKServerChangeToken
}
然后初始化一个对象:
let zone = CKRecordZone(zoneName: "my_custom_zone_name")
let options = CKFetchRecordZoneChangesOptions()
options.previousServerChangeToken = serverChangeToken
let operation = CKFetchRecordZoneChangesOperation(recordZoneIDs: [zone.zoneID], optionsByRecordZoneID: [zone.zoneID: options])
即使使用正确的CKServerChangeToken,我也会遇到这个错误,因为我没有控制数组
changedZoneIDs
有0个元素的情况
严格地说,您需要两个单独的CKServerChangeToken来访问数据库更改和区域更改(比如databaseChangeToken
和zoneChangeToken
)。您可以按照Bartłomiej Semanńczyk的解释创建它们
-使用recordZoneWithIDChangedBlock获取已更改区域的zoneID-使用fetchDatabaseChangesCompletionBlock保存databaseChangeToken并调用使用zoneChangeToken的CKFetchRecordZoneChangesOperation,
-每个区域都有自己的changeToken,因此我最终采用了以下解决方案:
let operation = CKFetchDatabaseChangesOperation(previousServerChangeToken: databaseChangeToken)
var changedZoneIDs: [CKRecordZoneID] = []
operation.recordZoneWithIDChangedBlock = { (zoneID) in
changedZoneIDs.append(zoneID)
}
operation.fetchDatabaseChangesCompletionBlock = { (databaseToken, moreComing, error) in
{
//manage moreComing
//save databaseToken
//manage error
if changedZoneIDs.count > 0
{
var optionsByRecordZoneID = [CKRecordZoneID: CKFetchRecordZoneChangesOptions]()
for zoneID in changedZoneIDs {
let changeTokenData = UserDefaults.standard.value(forKey: "\(zoneID.zoneName) zoneChangeToken") as? Data // Read change token from disk
var zoneChangeToken:CKServerChangeToken?
if (changeTokenData != nil){
zoneChangeToken = NSKeyedUnarchiver.unarchiveObject(with: changeTokenData!)as! CKServerChangeToken?
}
let options = CKFetchRecordZoneChangesOptions()
options.previousServerChangeToken = zoneChangeToken
optionsByRecordZoneID[zoneID] = options
}
let operation = CKFetchRecordZoneChangesOperation(recordZoneIDs: changedZoneIDs, optionsByRecordZoneID: optionsByRecordZoneID)
// ...
}
尤里卡!我忽略了zoneToken和databaseToken是不同的标记的概念。