OK I made a brand new test file to test this issue out.
Requirements:
- Project Name must contain an apostrophe (I used the name "test or don't test")
- Using the MobileAdvert object (I filled all fields with test)
Maybe this is fixed now with the new admob update? Which is in beta I believe.
It's possible other objects/plugins may also break the xcode export but this is what I was able to discover in my testing.