From: view 6(00:44-)

1.

Our psychologist will make a diagnosis and use the Happiness MVC to communicate it.

Psychologist really has no Model(perhaps its"diagnosis",but it doesn‘t store it anywhere).

Some MVCs are just for presenting user-interface(e.g. UINavigationController).

2. Watch for...

Reusing the Happiness MVC.

Creating a segue between our new MVC and a Happiness MVC.

Embedding our view controllers in a UINavigation Controller.

[Stanford 2011] Psychologist