[NCG_Mike]

The way I built MacOS applications in Obj-C was to use a dictionary with key/value pairs held inside either a NSDocument or a controller of some kind. I'd bind the views to the model, via the controller. No sub-classes of views.

It also had the benefit of been able to add undo/redo with a few lines of code. This even would undo radio button clicks as those controls were also bound to the model.

Saving the model was just a case of saving the dictionary or converting the dictionary in save and load from some other format, say ICC Color Profiles.

I'm not surprised to read that less experienced developers bung all their controller and model code in a sub-class of some view. It was a common thing to see in the MFC or PowerPlant days.