SwiftUI Essentials

Presenter: Taylor Kelly, SwiftUI Engineer

Link: https://developer.apple.com/wwdc24/10150

Why SwiftUI?

Rich features
Less code
Incremental adoption

Fundamentals of Views

Basic building blocks of user interfaces
Every pixel you see on screen defined by a view
Declarative vs. imperative
Compositional
State-driven

Built-in capability

Supports dark mode
Dynamic type
SwiftUI Previews let you see stuff as you develop
Adaptive quality - views display relevant to context - i.e. Button changing its apperance

Across all platforms

Build native apps for any Apple platform
Multiplier on efforts - UI built for one platform is a good head-start for apps built for other platforms
Common set of components across platforms, but also specialized APIs across platforms
"Learn once, use anywhere" - not "write once, use anywhere"

SDK interoperability

SwiftUI comes with each platform's SDK
Apps can pick-and-choose frameworks that provide compatibilities
SwiftUI provides interoperability
UIKit and AppKit are imperative, different patterns
Use a view representable to use UI or NS views within SwiftUI