Question

我只在一个线程上运行coredata。基本上我有一个消息传递应用程序，我试图批量删除消息...所以这工作..但一旦我开始再次发送消息...我得到此错误

这是我用来删除邮件的内容：

 let fetchRequest = NSFetchRequest(entityName: "Mesages")
                        fetchRequest.predicate = NSPredicate(format: "user.id = %@", friendID)
                        let batchDeleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
                        do {
                            try context.executeRequest(batchDeleteRequest)
                            context.refreshAllObjects()

                        } catch {}

错误域= NSCocoaErrorDomain代码= 133020“（null）”UserInfo = {conflictList =（ “NSMergeConflict（0x610000264140）for NSManagedObject（0x6080000ae520）with objectID'0xd000000006640002'with oldVersion = 1 and newVersion = and old object snapshot = {\ n fromID = 300147143696943; \ n isSender = 0; \ n status = \”\“; \ n text = Ggg; \ n timestamp = \“2016-09-18 02:13:30 +0000 \”; \ n toID = \“\”; \ n user = \“0xd000000000640000 \”; \ n}“， “NSMergeConflict（0x610000265ac0）for NSManagedObject（0x6000000adb60）with objectID'0xd000000006600002'with oldVersion = 2 and newVersion = and old object snapshot = {\ n fromID = 300147143696943; \ n isSender = 0; \ n status = \”\“; \ n text = Gg; \ n timestamp = \“2016-09-18 02:09:41 +0000 \”; \ n toID = \“\”; \ n user = \“0xd000000000640000 \”; \ n}“ ）}

我不知道发生了什么事，有人可以帮忙

Answer 1

也许您应该在save（）之前设置persistentContainer（NSPersistentCloudKitContainer）的viewContext的mergePolicy，这样编写：

yourContext.mergePolicy = NSMergeByPropertyStoreTrumpMergePolicy

OR

yourContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy

batchdelete导致NSMergeConflict coredata

1 个答案: