In my app, i currently have all my code separated into a static library, to make it easier to set up the xcode project targets for the actual app and for unit tests for my c
Yes You can. add a xib file in your library as you would do for any normal project. Then in library project target add the xib file in copy Files section along with .a file.
In your main project where you are using the library, drag and drop the xib file where .a file for library is located.