Now that we have a few functioning apps under our belt, we will take a look at what else there is to do in order to produce a truly release-ready app. One of these topics, the app icon, is mandatory for any project intended for release, while the others are brief explorations of technologies that you are likely to add too many of your own app projects.
The topics covered include:
Providing a custom icon to an app
Using an Xcode asset catalog
extensionto a class
Creating the UI layout in code
Creating sequential animations
Adding audio and video playback to your app