cocos2d-x 取NODE

//
Node* getNode(Node* beginNode, ...)
{
    if (beginNode == NULL) return NULL;

    Node* ret = beginNode;
    va_list argp;
    std:string para;
    va_start(argp, beginNode);
    int count = 0;
    while (1)
    {
        para = va_arg(argp, char*);
        if (strcmp(para.c_str(), "") == 0)
        {
            if (count == 0) ret = NULL;
            break;
        }
        count++;
        ret = dynamic_cast(ret->getChildByName(para));
        if (ret == NULL) return NULL;
    }
    va_end(argp);
    return ret;
}