NSString副本不复制？ [英] NSString copy not copying?

问题描述

  NSString *myString = @"sample string";
  NSString *newString = [myString copy];

如果我在这两行之后设置断点，myString的指针与指针的指针相同newString。

If I set a breakpoint after these two lines, the pointer for myString is the same as the pointer for newString.

WTF？是不是NSString副本应该返回一个指向新对象的指针？或者我错过了关于副本应该如何工作的基本原因？

WTF? Isn't NSString copy supposed to return a pointer to a new object? Or am I missing something fundamental about how copy is supposed to work?

推荐答案

因为 NSString 不可变它可能只是内部增加参考计数并完成它。

Since NSString is not mutable it might just internally increase ref count and be done with it.

当你发布其中一个NSStrings时，它可能只会减少 ref count - 标准内存管理。

When you release one of those NSStrings it might just decrement ref count - standard memory management.

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