How invite facebook friends and get their id from ios app? -

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i develop ios app chats (it's not game). have task invite fb friends(not using app) defined chat in app. need friend list, choose friens, send them notification(post on wall or message) , save fb friiend's id server. should use implemetation things?

facebook ios sdk has features need. can see friend list of user logged in using facebook session, etc more info @ https://developers.facebook.com/docs/ios/sample-apps


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