可可中的@package编译器指令是什么? [英] What is the @package compiler directive for in Cocoa?

问题描述

我在Apple的头文件中看到了很多@package，但是对于我来说，我找不到描述其含义的权威信息.

I see @package a lot in Apple's header files, but for the life of me, I can't find an authoritative source that describes its meaning.

推荐答案

@package是特定类成员的作用域声明.有四个:

@package is a scope declaration for a particular class member. There are four:

• @public :随时随地均可访问.
• @protected :可在定义它的类和继承类中访问.
• @private :可在定义它的类中访问.
• @package :采用64位格式，与@public类似，但仅在同一框架内； 32位，与@public相同.

• @public: Accessible everywhere.
• @protected: Accessible within the class that defines it and inheriting classes.
• @private: Accessible within the class that defines it.
• @package: In 64-bit, like @public, but only within the same framework; in 32-bit, identical to @public.

请参见 开发者文档 了解更多信息.

See this developer doc for more information.

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