I've start to work on ObjC language model for MPS.
You can see it in https://github.com/ido-ran/mps_objc
I have few problems I'll be glad to get help with:
1. I need to generate two files for each class concept - h file and m file. I've created two TextGen for ObjCClass concept but I'm not sure how to see if it generate them both, the preview show only one.
2. ObjC method names are constructed from combination of function name intermingled with parameter type and name. I've created it but I'll be glad to hear what other think on it.