重命名Core Data类 [英] Renaming Core Data class

问题描述

我有一个使用CoreData的应用程序。

I have an application that uses CoreData.

我以前有一个名为Marker的类，它链接到Core Data中的Marker实体。

I previously had a class named Marker which was linked to the Marker entity in Core Data.

我将Marker类重命名为CoreDataMarker。所以我创建了一个新的.xcdatamodel文件与实体的新类名。然后，我创建了一个.xcmappingmodel并选择旧的和新的.xcdatamodel文件，它似乎自动设置罚款。

I renamed the Marker class to CoreDataMarker. So I created a new .xcdatamodel file with the new class name for the entity. Then I created a .xcmappingmodel and selected the old and the new .xcdatamodel files and it seemed to 'auto-setup' fine.

但是，当我运行我的应用程序抱怨：不能合并模型与两个不同的实体命名为'标记'。我知道这发生了，但我不知道该如何解决。

However, when I run my application it complains with: "Can't merge models with two different entities named 'Marker'". I understand that this happens, but I have no idea how to solve it.

你知道吗？

提前感谢！

推荐答案

您不需要新的xcdatamodel。将 Marker 实体的实体描述中的类字段更改为 CoreDataMarker 。这就是所需要的。实现类信息不需要模式迁移。

You don't need a new xcdatamodel. Change the in the "Class" field in the entity description for your Marker entity to CoreDataMarker. That's all that's needed. The implementing class information does not require a schema migration.

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