title: How to execute a function every time a Navigator view controller is loaded?
body: <p>I have a second view on my app which is shown with a navigation bar. I'd like to execute a function when this second view opens. But when I open the second view and go back to the main view and reopen the second view, it shows the last change and no new changes. How do I execute a function every time the second view is shown?</p>