连续pop 到之前的两个页面的方法：

写项目中遇到的一点小问题，代码编写时：

需要返回到指定的页面初始化：

BUYMyGoodsControl *buyVC=[[BUYMyGoodsControl alloc] init];

    for (BUYMyGoodsControl * controller in self.navigationController.viewControllers) { //遍历
        if ([controller isKindOfClass:[BUYMyGoodsControl class]]) { //这里判断是否为你想要跳转的页面
            buyVC = controller;
            buyVC.shopObj=self.shopObj;
        }
    }
    if (buyVC) {
        [self.navigationController popToViewController:buyVC animated:YES]; //跳转

    }