gistfile1.m

- (id)initWithCancelButtonTitle:(NSString *)cancelTitle otherButtonTitles:(NSString *)otherButtonTitles, ... {
    if (self = [super init]) {
        NSMutableArray *buttonTitles = [[NSMutableArray alloc] init];
        
        BRYEachArgumentBlock eachArgumentBlock = ^(NSString *title) {
            [buttonTitles addObject:title];
        };
        
        BRYVarArgs(eachArgumentBlock, otherButtonTitles);
    }

    return self;
}

gistfile2.m

typedef void (^BRYEachArgumentBlock)(id argument);

void BRYVarArgs(BRYEachArgumentBlock eachArgumentBlock, id arguments, ...) {
    if (arguments && eachArgumentBlock) {
        va_list argumentList;
        va_start(argumentList, arguments);
        
        while ((argument = va_arg(argumentList, id))) {
            eachArgumentBlock(argument);
        }
        
        va_end(argumentList);
    }
}