Declare an ObjC parameter that's a Class conforming to a protocol

Question

In Objective-C, it is possible to pass a class as a parameter to a method:

- (void) methodThatTakesClass:(Class)theClass;

And it is possibl

Answer 1

also valid:

@interface Something: Object {
}
 - (void) foo:(int(*)(void))bar;
@end

@implementation Something
- (void) foo:(int(*)(void))bar {
   return (*bar)();
}
@end

int someFunc( void ) {
    return 9;
}

int main ( int argc, char **argv ) {
    Something *object = [[Something alloc] init];

    printf( "%i\n", [object foo:&someFunc] );

    [object release];

    return 0; 
}