Question

我发现了一个主题，它们是一个名为objectID的东西，以获取表格的每一行的自动增量ID，我想得到它并显示它，但我不明白该怎么做，我的代码：< / p>

    let appDel: AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate
    let context: NSManagedObjectContext = appDel.managedObjectContext

    let newDemande = NSEntityDescription.insertNewObjectForEntityForName("Demandes", inManagedObjectContext: context)
    newDemande.setValue(soapRequest.xmlString, forKey: "xml")
    newDemande.setValue(1, forKey: "statutenvoie")

    do {
        try context.save()
    } catch {
        print("erreur data")
    }

    do {
        let request = NSFetchRequest(entityName: "Demandes")
        let results = try context.executeFetchRequest(request)

        if results.count > 0 {
            for item in results as! [NSManagedObject]{
                let xml = item.valueForKey("xml")
                let statutenvoie = item.valueForKey("statutenvoie")

                print(xml!, statutenvoie!)
            }
        }
    } catch {
        print("erreur data")
    }

错误：

print(item.objectID)

2016-01-07 10：53：22.679 ... [956：28002] CoreData：错误： -addPersistentStoreWithType：SQLite配置：（null）URL：file：/// Users / informatiqueresponis / Library / Developer / CoreSimulator / Devices / FF92B583-0288-41FE-AD09-718E7E66D457 / data / Containers / Data / Application / B851E6CE-C0C9- 4FEE-9400-587995198D50 /文档/ SingleViewCoreData.sqlite options：（null）...返回错误Error Domain = NSCocoaErrorDomain Code = 134100“（null）”UserInfo = {metadata = { NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes =; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ “” ）; NSStoreType = SQLite; NSStoreUUID =“2654FBD8-4C1B-4001-827A-5C9D471B19C4”; “_NSAutoVacuumLevel”= 2; }，reason =用于打开商店的模型与用于创建商店的模型不兼容 userInfo字典{ metadata = { NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes =; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ “” ）; NSStoreType = SQLite; NSStoreUUID =“2654FBD8-4C1B-4001-827A-5C9D471B19C4”; “_NSAutoVacuumLevel”= 2; }; reason =“用于打开商店的模型与用于创建商店的模型不兼容”; 2016-01-07 10：53：22.683 ... [956：28002]未解决的错误错误域= YOUR_ERROR_DOMAIN Code = 9999“无法初始化应用程序保存的数据” UserInfo = {NSLocalizedDescription =无法初始化应用程序保存的数据，NSUnderlyingError = 0x7a632aa0 {错误 Domain = NSCocoaErrorDomain Code = 134100“（null）”UserInfo = {metadata = { NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes =; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ “” ）; NSStoreType = SQLite; NSStoreUUID =“2654FBD8-4C1B-4001-827A-5C9D471B19C4”; “_NSAutoVacuumLevel”= 2; }，reason =用于打开商店的模型与用于创建商店的模型不兼容}}， NSLocalizedFailureReason =创建或加载时出错应用程序保存的数据。}，[NSLocalizedDescription：失败初始化应用程序的已保存数据，NSUnderlyingError：错误 Domain = NSCocoaErrorDomain Code = 134100“（null）”UserInfo = {metadata = { NSPersistenceFrameworkVersion = 640; NSStoreModelVersionHashes = { Demandes =; }; NSStoreModelVersionHashesVersion = 3; NSStoreModelVersionIdentifiers =（ “” ）; NSStoreType = SQLite; NSStoreUUID =“2654FBD8-4C1B-4001-827A-5C9D471B19C4”; “_NSAutoVacuumLevel”= 2; }，reason =用于打开商店的模型与用于创建商店的模型不兼容}， NSLocalizedFailureReason：创建或加载时出错应用程序保存的数据。]（lldb）

Answer 1

我相信你指的是objectID in the NSManagedObject class：

var objectID: NSManagedObjectID { get }

在你的情况下试试：

if results.count > 0 {
        for item in results as! [NSManagedObject]{
            let xml = item.valueForKey("xml")
            let statutenvoie = item.valueForKey("statutenvoie")

            print(item.objectID)
            print(xml!, statutenvoie!)
        }
    }

核心数据ID自动递增

1 个答案: