常量NSStrings在哪里分配？ [英] Where are constant NSStrings allocated?

问题描述

我了解常量CString是静态分配的，而不是在堆上分配的。

I understand that constant CStrings are allocated statically, rather than on the heap.

我还注意到常量NSString具有无限的保留计数。

I also noticed that constant NSStrings have an infinite retain count. Does it hold true that constant NSStrings are also allocated statically, rather than on the heap?

推荐答案

常量NSString属于类<$，这是否成立？ c $ c> NSConstantString ，因此就像Lisp中的原子一样；他们闲逛。 -> NSConstantStrings 是静态分配的。也就是说，如果您使用 @ cow 在代码中的两个不同位置，它们将引用同一对象。

Constant NSStrings are of class NSConstantString, and thus act like atoms in lisp; they hang around. -> NSConstantStrings are allocated statically. That is, if you use @"cow" in two separate places in your code, they will be referencing the very same object.

NSConstantStrings 的原因保留计数是因为它们是从 NSObject 继承的。

The reason why NSConstantStrings even have a retain count is because they inherit from NSObject.

这篇关于常量NSStrings在哪里分配？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！