NSArray是否复制对象? [英] Does NSArray copy objects?

问题描述

当我使用+ [NSArray arrayWithObjects:]制作NSArray时，它会复制那些对象吗?如果将对象添加到数组后释放它们，是否会遇到问题?

When I make an NSArray using +[NSArray arrayWithObjects:], does it copy those objects? If I release the objects after adding them to the array, will I run into problems?

推荐答案

否，它不会复制它们.它保留了它们.是的，您可以在将对象添加到数组后安全地释放它们.

No, it doesn't copy them. It retains them. Yes, you can safely release the objects after adding them to the array.

文档和往常一样，非常清楚地说明了这一点:

The docs, as always, spell this out very clearly:

数组对它们的内容有很强的引用-在托管内存环境中，每个对象在将其ID添加到数组之前都会收到保留消息，并在从数组中删除或释放数组时收到释放消息.如果要使用具有不同对象所有权语义的集合，请考虑改用CFArray参考，NSPointerArray或NSHashTable.

Arrays maintain strong references to their contents—in a managed memory environment, each object receives a retain message before its id is added to the array and a release message when it is removed from the array or when the array is deallocated. If you want a collection with different object ownership semantics, consider using CFArray Reference, NSPointerArray, or NSHashTable instead.

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