此pdf文档为苹果公司IPOD的通讯协议，写的非常详细，非常难的的，这是我在一家公司做IPOD通讯给的，有需要的就下吧 已通过测试。 -This pdf document for the Apple IPOD communications protocol, very detailed, very difficult, this is a company to do IPOD communication, there is a need on the next to have passed