属性的访问器实现 [英] Accessor implementation of properties

问题描述

是否存在一些文档，说明编译器如何自动生成属性的访问器?

Is there some of documentation how the compiler auto-generates the accessors of properties?

在编写自定义访问器(覆盖综合访问器)时，很高兴知道原始实现. 尤其是要看到具有不同(弱/强/保留/复制等)属性的访问器的不同实现.

When writing custom accessors (overriding the synthesized ones), it would be nice to know the original implementation. Especially to see the differing implementations of accessors for properties with different (weak/strong/retain/copy etc..) attributes.

推荐答案

是否有一些文档，说明编译器如何自动生成属性的访问器?

Is there some of documentation how the compiler auto-generates the accessors of properties?

编译器仅添加一个C函数调用.窥视汇编(例如_objc_getProperty和_objc_setProperty).

The compiler just adds a C function call. Peek at the asm (e.g. _objc_getProperty and _objc_setProperty).

在编写自定义访问器(覆盖综合访问器)时，很高兴知道原始实现.尤其是要看到具有不同(弱/强/保留/复制等)属性的访问器的不同实现.

When writing custom accessors (overriding the synthesized ones), it would be nice to know the original implementation. Especially to see the differing implementations of accessors for properties with different (weak/strong/retain/copy etc..) attributes.

这些实现是在 http://www托管的objc运行时中公开提供的. opensource.apple.com/source/objc4/.

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