iOS \\ Android Facebook SDK - 获取好友列表，其中一些没有用户名

Question

I'm using iOS and Android Facebook native SDK in my app. In general, I'm getting the friends list, each with name, birthday (if public) and username. About the birthday property, I know that one can block it from appearing in mobile apps (or at all). But I see that in some rare cases, username is NULL. I couldn't find any explanation for it in the Facebook documentation.

Any help will be great.

Answer 1

Some people just haven't chosen a username.

If you look on the www page, their profile links will be facebook.com/profile.php?id=user_id rather than facebook.com/username.