How to let user go back to the root view on iOS

1. How do I dismiss a particular view controller in iOS?
2. How do I change the root view controller in Swift 5?

How do I dismiss a particular view controller in iOS?

From iOS 13.0 onwards, whenever you present a UIViewController you get a card-like user interface where the new view controller can be dismissed by swiping downwards.

How do I change the root view controller in Swift 5?

plist file → Application Scene Manifest property → Scene Configuration → item 0 and get rid of the property Storyboard Name by clicking the icon that has a minus in the circle next to it. ► Run the app and you will see the black screen and let's change that by setting a new root view controller.