You can import .m (Objective-C) files directly into your BlitzMax code, if I am not mistaken. It works with .c files, but in the end they all use the same compiler.
The other way around, you will probably run into problems, because I presume that BlitzMax files will have to link against the BlitzMax runtime, and Xcode will not "know" how to do that. But there are more competent folks around here to answer that kind of question.
The other way around, you will probably run into problems, because I presume that BlitzMax files will have to link against the BlitzMax runtime, and Xcode will not "know" how to do that. But there are more competent folks around here to answer that kind of question.