I would like to be able to parse a vCard from a string and produce a string representation for a vCard.
Check out this library, I'm not the creator but i've used and it works just fine. Just take a look in the comments as there is a error that needs fixing in the library.
来源：https://stackoverflow.com/questions/5208581/looking-for-a-library-for-vcard-generation-and-parsing-in-objective-c-c-c-f