问题
I have a requirement where the same iPhone is shared among a small set of people.
Is there an iOS API that allows me to determine who unlocked the phone, so that I can create a user-specific display of my application?
回答1:
Nope, can't be done. All you know is that the Touch ID succeeded or not.
Keep in mind that an iOS device with Touch ID has no concept of a user. You can simply register several different finger prints. None are tied to a specific person.
来源：https://stackoverflow.com/questions/32997460/can-touch-id-be-used-to-allow-many-people-to-use-the-same-iphone