How to call an Objective-C Method from a C Method?

I know your question is already answered by Aviad but just to add to the info since this is not unrelated:

In my case I needed to call an Objective-C method from a C function that I did not call myself (a Carbon Event function triggered by registering a global hotkey event) so passing self as a parameter was impossible. In this particular case you can do this:

Define a class variable in your implementation:

id thisClass;

Then in your init method, set it to self:

thisClass = self;

You can then call Objective-C methods from any C function in the class without the need to pass self as a parameter to the function:

void cMethod([some parameters]) {
    [thisClass thisIsAnObjCMethod];
}

转自：http://stackoverflow.com/questions/1280017/how-to-call-an-objective-c-method-from-a-c-method