SwiftUI Animation

Overview

Comprehensive guide to SwiftUI's animation system, from foundational concepts to advanced techniques. This skill covers the Animatable protocol, the iOS 26 @Animatable macro, animation types, and the Transaction system.

Core principle Animation in SwiftUI is mathematical interpolation over time, powered by the VectorArithmetic protocol. Understanding this foundation unlocks the full power of SwiftUI's declarative animation system.

System Requirements

• iOS 13+: Animatable protocol, timing/spring animations
• iOS 17+: Default spring animations, scoped animations, PhaseAnimator, KeyframeAnimator
• iOS 18+: Zoom transitions, UIKit/AppKit animation bridging
• iOS 26+: @Animatable macro

Part 1: Understanding Animation