何时需要NSCopying？ [英] When is NSCopying needed?

问题描述

我知道是否需要将您的对象用作NSDictionary中的键。

I know it's needed if your object will be used as a key in an NSDictionary. Are there any other times like this that NSCopying is required?

如果我认为不需要我的模型对象符合NSCopying，是否可能是错误的？

If I think I don't need my model objects to conform to NSCopying, am I probably wrong?

推荐答案

当将其传递给copy属性或记录为复制其参数的任何其他方法时。

When it's being passed to a copy property or any other method that is documented as copying its argument.

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