Question

我有一个InMemory Store Coordinator声明如下：

lazy var ramStoreCoordinator: NSPersistentStoreCoordinator = {
    // The persistent store coordinator for the application. This implementation creates and returns a coordinator, having added the store for the application to it. This property is optional since there are legitimate error conditions that could cause the creation of the store to fail.
    // Create the coordinator and store
    let coordinator = NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
    var failureReason = "There was an error creating or loading the application's saved data."
    do {
        try coordinator.addPersistentStoreWithType(NSInMemoryStoreType, configuration: nil, URL: nil, options: nil)
    } catch {
        // Report any error we got.
        var dict = [String: AnyObject]()
        dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
        dict[NSLocalizedFailureReasonErrorKey] = failureReason

        dict[NSUnderlyingErrorKey] = error as NSError
        let wrappedError = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
        // Replace this with code to handle the error appropriately.
        // abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
        NSLog("Unresolved error \(wrappedError), \(wrappedError.userInfo)")
        abort()
    }

    return coordinator
}()

以及关联的ManagedObjectContext：

lazy var ramManagedObjectContext: NSManagedObjectContext = {
    // Returns the managed object context for the application (which is already bound to the persistent store coordinator for the application.) This property is optional since there are legitimate error conditions that could cause the creation of the context to fail.
    let coordinator = self.ramStoreCoordinator
    var managedObjectContext = NSManagedObjectContext(concurrencyType: .MainQueueConcurrencyType)
    managedObjectContext.persistentStoreCoordinator = coordinator
    managedObjectContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
    return managedObjectContext
}()

我试图像这样执行获取请求：

    let fetchRequest = NSFetchRequest(entityName: "Post")
    let batchDelete = NSBatchDeleteRequest(fetchRequest: fetchRequest)
    do {
        // Execute Batch Request
        try ramManagedObjectContext.executeRequest(batchDelete)
    } catch {
        let updateError = error as NSError
        print("\(updateError), \(updateError.userInfo)")
    }

行：

try ramManagedObjectContext.executeRequest(batchDelete)

使用以下输出崩溃应用程序：

2016-04-30 23：47：40.271 Secret [2368：1047869] *由于未捕获的异常终止应用程序＆＃39; NSInternalInconsistencyException＆＃39;，原因：＆＃39;未知的命令类型（实体： EntityName;谓词：（（null））; sortDescriptors：（（null））; type：NSManagedObjectIDResultType;）＆gt;＆＃39; * 第一次抛出调用堆栈：（0x18145ae38 0x180abff80 0x1833710b0 0x18338991c 0x183391d64 0x101121a3c 0x10112d5f0 0x1833845bc 0x1832c1d5c 0x183354e04 0x10011abc4 0x10011947c 0x100092bf0 0x10009269c 0x1000926ec 0x186a1aac0 0x186a1b258 0x186901854 0x186904a4c 0x1866d4fd8 0x1865e0014 0x1865dfb10 0x1865df998 0x183f4da20 0x101121a3c 0x1011274e4 0x181410dd8 0x18140ec40 0x181338d10 0x182c20088 0x18660df70 0x1000fcba8 0x180ed68b8） libc ++ abi.dylib：以NSException类型的未捕获异常终止

Answer 1

根据我的经验，NSBatchDeleteRequest无法使用NSInMemoryStoreType。我正在尝试同样的方法来测试我的方法，但我将不得不忍住这一点。

修改

添加Marcus Zarra's推文作为证据。

Answer 2

我遇到了完全相同的问题。通过将内存存储库更改为NSSQLiteStoreType来解决此问题。没有做任何研究为什么在内存商店发生这种情况，但我希望能解决你的问题。

Answer 3

NSBatchDeleteRequest应该在你的ramStoreCoordinator上执行，而不是ramManagedObjectContext，因为它直接与NSPersistenceStore类实例一起工作：

try persistentStoreCoordinator.executeFetchRequest(batchDelete, withContext: ramManagedObjectContext)

检查此链接以获取更多详细信息： https://developer.apple.com/videos/play/wwdc2015/220/

希望它有所帮助）

Answer 4

在XCode外部重命名某些文件时，可能会发生此错误。要解决此问题，您只需从项目中删除文件（右键单击 - 删除和＆＃34;删除参考和＃34;）您重新导入项目中的文件，一切都会好的！

如果没有解决，请尝试此

try persistentStoreCoordinator.executeFetchRequest(
    batchDelete, withContext:context
)

因为NSBatchDeleteRequest在持久性存储协调器上执行，而不是在托管对象上下文上执行。

批量删除请求崩溃应用程序

4 个答案: