如何使用swift优先解析Object？

Question

"byte_package" =     (
                {

            attribute = "<null>";
            balance = "1517268.75";
            "changed_at" = "2016-05-12 16:57:01";
            "created_at" = "2016-05-10 11:03:37";
            description = "2.3 GB BYTE Package. Expires in 30 days.";
            expiration = "2016-06-09 00:00:00";
            "expired_flag" = 0;
            id = 930;
            "package_flag" = 1;
            rid = "BYTE-00002";
            title = "2.3 GB";
            type = BYTE;
            used = "894456.00";
            "used_flag" = 0;
            value = "2411724.75";
        }

我想使用首选项解析数组中的上部Object。 如何使用首选项解析对象数据？然后将对象数据存储到CoreData。如何解决这个问题呢？。请帮助我。