What is a UIViewController
iphone, uiview, uiviewcontroller
Solution
Basically you need to know, what is model-view-controller architecture in the software engineering field, the `UIView` corresponds to view of this architecture and `UIViewController` is at controller side of this architecture.
Now `UIViewController` can be thought as an agent that controls (and has the implementations of methods) the events and design of the `UIView` that is shown on the screen. Anything you want to change on the view can be written inside a method in its controller class, that inherits itself from `UIViewController` class. That is only the brief description of this big concept. For details you should look for the above link.
Problem
I know what a `UIView` is but not a `UIViewController`. I just want to know what I could use it for, and what it is compared to a `UIView`