Question

Is it possible to access the super class method of an objects super class (or grandfather)?

For instance:

GrandFatherObject : NSObject
SuperObject : GrandFatherObject
SelfObject : SuperObject

From SelfObject:

- (void)overriddenMethod
{
  // For Self
  someCode();

  // For Parent
  [super overriddenMethod];

  // For GrandParent
  ???
}

I only have access to SelfObject (Can’t modify SuperObject or GrandFatherObject)

Answer 1

Yes, you can do it, but it takes a bit more code than just invoking super.

More or less, it’d be something like this:

#import <objc/runtime.h>

struct objc_super grandsuper;
grandsuper.receiver = self;
grandsuper.class = class_getSuperclass(class_getSuperclass([self class]));

//if _cmd has a non-struct return value:
id grandsuperReturnValue = objc_msgSendSuper(&grandsuper, _cmd, arg1, arg2, ...);