Creating a static library and adding it to the project

So, I'm trying to add Semantics3 objective-c code to a project I'm working on. I followed the directions they had on their Github page to no avail, I always get an error Undefined symbols for architecture x86_64:

even though I made sure before building the build that it valid architectures

contained in the build settings armv7 armv7s arm64

and that the correct targets were selected. I also made sure to add the file .a

that was in the universal folder in /Product

. However, not knowing if I had built their code correctly, I tried to go to the section "Adding a static library to your code" at http://www.raywenderlich.com/41377/creating-a-static-library-in-ios- tutorialI am doing everything right, the compiler finds the header files, but after adding the static library, the project still won't build and I still get the same error. I've read numerous answers on SO and elsewhere on the internet and nothing I've done seems to fix the problem. What could be wrong?