如何调用具有可变数量参数的实现? [英] How to call an implementation with variable number of arguments?

问题描述

为了简化，假设我有一个这样的函数

To simplify, let's say I have a function like that

void myFunc(id _self, SEL _cmd, id first, ...)
{

}

在那个方法中，我想调用 _self 超类的实现(imp).我可以使用此代码访问该 IMP:

In that method I wanna call the implementation(imp) on the superclass of _self. I can reach that IMP with this code:

Class class = object_getClass(_self);
Class superclass = class_getSuperClass(class);
IMP superimp = class_getMethodImplementation(superclass, _cmd);

现在，我该怎么称呼那个小鬼?

now, how can I do to call that imp ?

推荐答案

只需使用可变参数调用即可:

Just call it using variable arguments:

superImp(self, _cmd, argument1, argument2, argument3, etc...)

IMP 已经 typedef'd as

IMP is already typedef'd as

typedef id (*IMP)(id, SEL, ...);

因此您可以毫无问题地使用可变参数调用它.

So you can call it with variable arguments with no issue.

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