处理CoreData和可选类型的目标C中的新特性
我与Coredata合作，提出了一些我无法通过研究回答的问题。假设我已经开发了一个应用程序，并且使用Coredata进行持续存储。现在，我想更新该应用程序并将属性添加到实体。我认为最好的解决方案是使新属性可选，以使现有实例没有问题，您是否同意？另一件事是，当我尝试时，我注意到INT16？不允许，因为它与Objective-C不起作用。但是作为替代方案，nsnumber？作品，我不喜欢它。您如何做，最佳实践是什么样的？
I work with CoreData and I came up with some questions that I could not answer through research. Let's assume I have developed an app and the persistent storage is done with CoreData. Now I want to update the app and add a property to an entity. I think the best solution is to make the new property optional so that there are no problems with the existing instances, do you agree? Another thing is that when I try, I noticed the int16? not allowed because it does not work with objective-c. But as an alternative, NSNumber? works, which I somehow don't like. How do you do it and what does the best practice look like?
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