Do I need to learn Swift before SwiftUI?

Yes, SwiftUI is absolutely ready on both platforms: 30.7%

The answer is quite simple actually. If you have a lot of experience developing any sort of apps wether web, desktop or mobile, then Swift Storyboard is your go to because you will learn what SwiftUI is abstracting from you.

It is easier because SwiftUI was designed to layout your interface using defaults . A paradigm that is akin to getting into a car with an automatic gearbox. UIKit, conversely, is like having a stick shift. It is easier, too, because Apple has worked hard to unify the syntax of many frameworks within SwiftUI.6 Oca 2022