对象内省:方法如何引用其自己的选择器? [英] Obj-C introspection: How can a method reference its own selector?

问题描述

我希望编写一个可在任何方法中使用的宏，该宏引用该方法的选择器.我不希望传递该方法的字面名称.例如:

I wish to write a macro, to be used within any method, which references the method's selector. I do not wish to pass the literal name of the method. For example:

#define RERUN [self performSelector:{something} withObject:nil afterDelay: 0.0]

其中上面的"{something}"将解析为使用该宏的任何方法的选择器.

where the "{something}" in the above would resolve to the selector of whatever method the macro was used in.

有什么方法可以做到这一点?

Is there some way to do this?

推荐答案

_cmd表示当前方法的选择器-它是一个隐藏参数(如self).

_cmd represents the selector of the current method -- it is a hidden argument (like self).

如果您永远不需要参数，或者nil适合您的目的-您所需要做的就是编写:

if you never need arguments, or nil is suitable for your purpose - all you need to do is write:

#define RERUN [self performSelector:_cmd]

这篇关于对象内省:方法如何引用其自己的选择器?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！