Accessing Instance Variable in C Style Method

Question

Can someone confirm that you cannot access instance variables defined in an Objective C @implementation block from within C style functions of the same class? The compiler

Answer 1

A "C style method" doesn't really deserve the name "method", I'd call it a "function" instead as in C.

A C function has no self, so it cannot implicitly access ivars as a method can. If you pass an instance to the C function as a parameter, you can access ivars in the same manner you would access a field in a struct pointer.