核心数据错误代码= 134030"保存时发生错误"没有userInfo

时间:2016-09-13 21:28:56

标签: ios swift core-data

我有一个使用Xcode 8 GM种子在Swift 3中构建的应用程序。该应用程序具有键盘扩展名。我使用共享组目录作为sqlite db位置,并且使用框架完成数据库访问。一切正常,直到我尝试从键盘调用SaveContext()。我收到标题错误代码= 134030中提到的错误。消息说"保存时发生错误"并且没有其他信息。我没有用户信息来解决潜在的错误。

我已经丢弃了一些调试信息,以确保我查看了我尝试更新的同一项目的同一个实例。这是一个非常简单的更新,只是在使用某些内容时递增使用计数器。从键盘扩展程序保存有问题吗?它们是以只读模式打开吗?

这是CoreDataStack的主要内容:

let coreDataStack = CoreDataStack()

public class CoreDataStack {

public func saveContext()
{
    let context = persistentContainer.viewContext
    if context.hasChanges {
        do {
            try context.save()
        } catch let error {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() 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.
            let nserror = error as NSError
            fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
        }
    }
}

// MARK: - Private

lazy var managedObjectContext: NSManagedObjectContext = {
    return self.persistentContainer.viewContext
}()

lazy var persistentContainer: NSPersistentContainer = {
    /*
     The persistent container for the application. This implementation
     creates and returns a container, having loaded 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.
     */
    let modelUrl = Bundle(identifier: "com.myapp.AppDataKit")?.url(forResource: "MyApp-SE", withExtension: "momd")
    let managedObjectModel = NSManagedObjectModel(contentsOf: modelUrl!)!
    let container = NSPersistentContainer(name: "MyApp-SE", managedObjectModel: managedObjectModel)
    container.persistentStoreDescriptions = [NSPersistentStoreDescription(url: try! FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.com.myapp")!.appendingPathComponent("MyAppSEData.sqlite"))]

    container.loadPersistentStores(completionHandler: { (storeDescription, error) in
        if let error = error as NSError? {
            // Replace this implementation with code to handle the error appropriately.
            // fatalError() 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.

            /*
             Typical reasons for an error here include:
             * The parent directory does not exist, cannot be created, or disallows writing.
             * The persistent store is not accessible, due to permissions or data protection when the device is locked.
             * The device is out of space.
             * The store could not be migrated to the current model version.
             Check the error message to determine what the actual problem was.
             */
            fatalError("Unresolved error \(error), \(error.userInfo)")
        }
    })
    return container
}()

} // class CoreDataStack

在捕获中我检查错误,我无法从中获取更多信息。在将它转换为NSError后,它仍然没有帮助,因为userInfo是一个空的dict。 我还没有实现错误处理,但我可以看到键盘中的项目,因此检索没有问题。只有在保存时才会崩溃。 我尝试更新的地方非常简单:

item.useCount = NSNumber(value: item.useCount.intValue + 1)
Logger.add(item.debugDescription)
AppData.SaveContext()

AppData是一个具有静态函数的类,用于访问核心数据

public class AppData {
    public static func SaveContext() {
        coreDataStack.saveContext()
    }
    ...
}

我查看了设备日志,但没有获得更好的信息。我可以在数据工具包中看到两行,然后从libswiftCore.dylib

中看到两行
0   libswiftCore.dylib  0x0000000100ab2848 0x100a80000 + 206920
1   libswiftCore.dylib  0x0000000100ab2848 0x100a80000 + 206920

任何人都知道如何在Xcode8中象征libswiftcore?

谢谢, 麦克

1 个答案:

答案 0 :(得分:0)

我明白了。事实证明,这是因为键盘的“允许完全访问”选项已关闭。因此,如果您希望能够写入共享组文件夹,包括更新sqlite数据库,则必须安装应用程序&键盘并首先检查“允许完全访问”选项。然后,您可以返回Xcode并在调试模式下运行扩展。保留设置,一切都应该有效。

麦克