Building an IOS app with Facebook SDK integration

So I've searched all possible source before turning here, but i seem to fail in every attempt. Would really like to see some kind of step-by-step instructions, or a checklist for things taht might go wrong. Here's my exact setup:

1. I work in Unity (5.1) on a PC. I create an EMPTY project (no assets or code), and just import the Facebook SDK for unity. (I've nade attempts with 6.2.2 and 7.0.2 beta)

2. I configure the Facebook with my app ID.

3. I build my project for IOS (debug) and copy the build bolder to my Mac

4. I open the project file in Xcode ant attempt to build for my device. Here the problems begin: I constantly getting missing files. for 6.2.2 it's "fbuinityinterface.mm", and if i import it, it's "fbuinityinterface.h" and then something else for 7.0.2, it's "nativedialogs.cs", and then some library it's unable to link. I'm pretty sure i'm missing something major here. I'm not even sure what are the correct folders to put the files i import manually in. Please help

Thanks