Introduction to SwiftUI (WWDC 2020)

Explore the world of declarative-style programming: Discover how to build a fully-functioning SwiftUI app from scratch as we explain the benefits of writing declarative code and how SwiftUI and Xcode can combine forces to help you build great apps, faster.

More info: 
https://developer.apple.com/documentation/swiftui

Video:
https://developer.apple.com/videos/play/wwdc2020/10119/