Today we go over how to use UIAlertController with Swift 4. In this tutorial, you will learn how to present both alerts and action sheets so you can present information to your users.
UIAlertControllers are a subclass of UIViewController and have great built in functionality for displaying alerts and providing user input with just a few lines of code. Since they are part of UIKit, they are automatically updated to the current UI designs that Apple implements, so you can be sure they always look