App navigations, why care about them

Many iOS applications are pretty simple regarding navigation flows. In fact, having simple flows really helps to have a very easy-to-use app.

Many apps are based on a tab bar controller with some sections. Each section tends to have a navigation controller that stacks other view controllers. And very often, a view controller A always presents a view controller B. To handle that navigation, we traditionally end up adding this kind of code in our view controllers:

It could be discussed if having this kind of code in the view controller is right or not, but in…