title: How invite facebook friends and get their id from ios app?
body: <p>I develop ios app with chats (it's not game). I have a task to invite all fb friends(not only who using my app) to a defined chat in my app. So for do this I need get all friend list, choose friens, send them notification(post on wall or message) and save fb friiend's id to my server. What I should use for implemetation this all things?</p>