作为我的项目的一部分，已经有一个现有的“*.xcdatamodeld”核心数据包/包，其中包含一个“*.xcdata模型”（由于是当前版本，所以带有绿色勾号）以及许多.h和.m NSManagedObject文件。
我想让XCode生成一个新的NSManagedObject（.h和.m文件），并将其添加到“*.xcdatamodeld”捆绑包中。
我尝试过的方法有：
1） 突出显示“*.xcdatamodeld”并选择“编辑器>；创建NSManagedObject子类…”等。
2） 右键单击“*.xcdatamodeld”并选择“将文件添加到*”，然后选择NSManagedObject，等等。
我已经考虑过之后是否应该将文件移到捆绑包中，但我似乎也找不到任何方法。
请帮忙？
正如你所建议的，我的回答是：
我认为XCode4不可能实现这一点。在XCode3中，这没有问题。您仍然可以手动将文件复制到包中，但无法在模型中获取这些文件。我不认为这是XCode3的预期方式，苹果现在纠正了这一点。
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