Intercept method call in Objective-C

Question

Can I intercept a method call in Objective-C? How?

Edit: Mark Powell\'s answer gave me a partial solution, the -forwardInvocation

Answer 1

You do it by swizzling the method call. Assuming you want to grab all releases to NSTableView:

static IMP gOriginalRelease = nil;
static void newNSTableViewRelease(id self, SEL releaseSelector, ...) {
   NSLog(@"Release called on an NSTableView");
   gOriginalRelease(self, releaseSelector);
}


  //Then somewhere do this:
  gOriginalRelease = class_replaceMethod([NSTableView class], @selector(release), newNSTableViewRelease, "v@:");

You can get more details in the Objective C runtime documentation.