…View objects tend to be controls that view and edit,
Cocoa’s got a lot of those, well written to its credit.
Take an NSTextView, hand it any old Unicode string,
the user interacts with it, it can hold most anything.
But the view don’t knows about the Model:
That string could be a phone number or the words of Aristotle.
Keep the coupling loose and so achieve a massive level of reuse.

Fragmento de Model, View, Controller, divertida canción sobre el paradigma MVC. Pueden descargar el mp3 de la canción y ver su letra. Enjoy it!