How to refresh UIViewController programmatically?

Question

I have a ViewController in which the user selects a card (a custom UIButton) out of a UIScrollView. I have intercepted the touch event selecting the card and identified it,

Answer 1

You can either let view controller observe your models or update your views manually.

I'm not very clear about your question, what is still remaining on your view?

For automatically update views when model changes, I suggest ReactiveCocoa.