Question

我正在尝试将我的应用保存到AppDelegate.swift中的核心数据，但在退出应用时，它会在控制台中与此日志崩溃：

2015-04-04 22:04:38.043 myapp[14882:714850] CoreData: error: -addPersistentStoreWithType:SQLite configuration:(null) URL:file:///Users/kiancross/Library/Developer/CoreSimulator/Devices/59D353AF-8C56-42D6-8B35-9F51FE04D1BC/data/Containers/Data/Application/66D76678-B819-4B01-8172-6324BB5D2E7B/Documents/myappsqlite options:(null) ... returned error Error Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa error 134100.)" UserInfo=0x7fc453dcb120 {metadata={
    NSPersistenceFrameworkVersion = 519;
    NSStoreModelVersionHashes =     {
        SavedData = <f13dc99c 2ebf5dd2 a89322cb 537a0f94 361477df 04077315 5954c0b5 afd3f9a1>;
    };
    NSStoreModelVersionHashesVersion = 3;
    NSStoreModelVersionIdentifiers =     (
        ""
    );
    NSStoreType = SQLite;
    NSStoreUUID = "E748E18D-F898-4AC1-96A4-7F8F1925D369";
    "_NSAutoVacuumLevel" = 2;
}, reason=The model used to open the store is incompatible with the one used to create the store} with userInfo dictionary {
    metadata =     {
        NSPersistenceFrameworkVersion = 519;
        NSStoreModelVersionHashes =         {
            SavedData = <f13dc99c 2ebf5dd2 a89322cb 537a0f94 361477df 04077315 5954c0b5 afd3f9a1>;
        };
        NSStoreModelVersionHashesVersion = 3;
        NSStoreModelVersionIdentifiers =         (
            ""
        );
        NSStoreType = SQLite;
        NSStoreUUID = "E748E18D-F898-4AC1-96A4-7F8F1925D369";
        "_NSAutoVacuumLevel" = 2;
    };
    reason = "The model used to open the store is incompatible with the one used to create the store";
}
2015-04-04 22:04:38.047 myapp[14882:714850] Unresolved error Optional(Error Domain=YOUR_ERROR_DOMAIN Code=9999 "Failed to initialize the application's saved data" UserInfo=0x7fc453dcce00 {NSLocalizedDescription=Failed to initialize the application's saved data, NSLocalizedFailureReason=There was an error creating or loading the application's saved data., NSUnderlyingError=0x7fc453db2360 "The operation couldn’t be completed. (Cocoa error 134100.)"}), Optional([NSLocalizedDescription: Failed to initialize the application's saved data, NSLocalizedFailureReason: There was an error creating or loading the application's saved data., NSUnderlyingError: Error Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa error 134100.)" UserInfo=0x7fc453dcb120 {metadata={
    NSPersistenceFrameworkVersion = 519;
    NSStoreModelVersionHashes =     {
        SavedData = <f13dc99c 2ebf5dd2 a89322cb 537a0f94 361477df 04077315 5954c0b5 afd3f9a1>;
    };
    NSStoreModelVersionHashesVersion = 3;
    NSStoreModelVersionIdentifiers =     (
        ""
    );
    NSStoreType = SQLite;
    NSStoreUUID = "E748E18D-F898-4AC1-96A4-7F8F1925D369";
    "_NSAutoVacuumLevel" = 2;
}, reason=The model used to open the store is incompatible with the one used to create the store}])

在AppDelegate.swift中触发此错误的代码是：

func applicationDidEnterBackground(application: UIApplication) {
        // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
        // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.


        let appDelegate = UIApplication.sharedApplication().delegate as AppDelegate
        let managedContext = appDelegate.managedObjectContext!

        let entity =  NSEntityDescription.entityForName("SavedData", inManagedObjectContext: managedContext)


        let managedObject = NSManagedObject(entity: entity!, insertIntoManagedObjectContext:managedContext)

        managedObject.setValue(sharedData.jsonUrl, forKey: "jsonUrl")

        var error: NSError?
        if !managedContext.save(&error) {
            println("Could not save \(error), \(error?.userInfo)")
        }

    }

这是我的CoreData模型;你可以看到下面的屏幕截图：

core data screen shot

正如你所看到的，它拥有应有的一切。

我的问题是我的代码的哪一部分导致了这次崩溃？我按照this教程将CoreData应用到应用程序中，我几乎可以肯定我已经尽可能地遵循它来满足我的应用程序需求。

谢谢，

Answer 1

我不太确定但错误的最后一行是：reason=The model used to open the store is incompatible with the one used to create the store}])这意味着coredata的数据模型与您正在使用的数据模型不同。

只需删除应用程序（应用程序图标上的LongPress并将其删除）并再次运行，这至少可以解决这个问题。

更好的解释是here

从模拟器中删除应用程序并对项目执行清理。这应该清除这些问题。删除应用程序时确保没有在调试器中运行，否则它实际上不会正确删除它。

如果您想确定它已消失，请在您正在运行的版本下查看此目录Users / INSERT_YOUR_USER_HERE / Library / Application Support / iPhone Simulator / for your app的文件夹。

注意：这仅用于开发。对于生产，您需要实现某种迁移。谷歌“核心数据迁移”，轻量级迁移是最简单的。“

为什么我的应用程序在尝试保存到核心数据时崩溃了？

1 个答案: