To address comment #2, I've dealt with it a bit differently: Meaning backend may not always be ahead of iOS. (Especially if it's a new app). What I advise is

To address comment #2, I've dealt with it a bit differently: Meaning backend may not always be ahead of iOS. (Especially if it's a new app). What I advise is to make a stub instance, to simply create the API calls and return dummy data. You can do this quickly and easily in all major frameworks and gets you most of the way there. On another note, I never would have thought I'd hear the term "Object Oriented UI design" - but I like it!