I have been an iOS developer for over a decade now and have rarely seen articles that consolidate all possible ways to perform animations in iOS. This article aims to be a primer on iOS animations with the intent of exhaustively covering the different ways of doing the same. Given the extensiveness of the topic, we would cover each part succinctly at a fairly high level. The goal is to educate the reader with a set of choices to add animations to his/ her iOS app.

https://www.smashingmagazine.com/2019/11/performing-ios-animations-views-uikit-uiview/