ios xCode.. 90 errors after Unity export

So I recently got the apple dev lisence and have made my first ios app... I exported the app and imported it into xcode, following the unity tutorial on youtube.

Strangely, when I try to archive the app, I get about 90 errors- 70 of them are mach-o-linker errors. Am I doing something wrong in Unity which brings up all these errors? I targeted ios 7.0 and set up everything according to the tutorial.

Some of these errors even relate to "ads" - but my game doesn't have any ads. Here are the errors, anyone know where I'm going wrong here?