在运行时获取类的类别详细信息? [英] Obtain details of categories on a class at runtime?

问题描述

在Objective-C中，有没有一种方法可以在运行时列出特定类的类别?

In Objective-C, is there a way to list the categories on a particular class at runtime?

使用Objective-C运行时函数，我可以获得有关类和实例方法，类层次结构，实例变量等的详细信息，但似乎没有类别信息.

With the Objective-C runtime functions I can obtain details for the class and instance methods, class hierarchy, instance variables, etc. but seemingly not the category information.

看F脚本，我发现它不显示类别信息(实际上，它似乎根本不显示类别中的方法).另一方面，类转储会提取类别信息，但这是从二进制文件而不是在运行时提取的.

Looking at F-Script, I see that it doesn't display category information (indeed, it appears not to display methods from categories at all). On the other hand, class-dump extracts category information but this is from the binary and not at runtime.

在objc/runtime.h中提到struct objc_category，但这看起来是私有的.有没有受支持的方法?

There's a mention of struct objc_category in objc/runtime.h but this looks to be private. Is there a supported way?

推荐答案

来自:

类别方法可以执行适当的类中定义的方法可以执行的任何操作.在运行时，没有任何区别.

Category methods can do anything that methods defined in the class proper can do. At runtime, there’s no difference.

现代的Objective-c(ios，10.5)已删除了对objc_category结构的支持，从而使该信息变得不透明.

the support for objc_category struct has been removed with modern objective-c (ios, 10.5), making this information opaque.

恐怕您无法获得所需的信息.

I'm afraid you can't get the information you want.

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