问题
I am building an app where I do not want a loginsystem. I still want to be able to know what user is sending information to my online database. As far as I know, the UDID is not allowed to upload to any servers, so that is out of the question. Can I use the iphones mac address for this? If it is dynamic, it will change from time to time, and I won't be able to track it.
回答1:
We use the MAC address as a unique identifier now the UDID has been deprecated.
MAC addresses are hardware based and therefore cannot be changed.
来源：https://stackoverflow.com/questions/12955111/is-the-iphones-mac-address-static-looking-for-a-way-to-identify-which-user-is-o