SwiftUI Animation Reference

About

This skill serves as a master reference for SwiftUI's animation system, covering everything from the fundamental math of VectorArithmetic to advanced techniques like custom Animatable conformance and the new iOS 26 @Animatable macro. It helps developers solve common issues like why certain properties won't animate, how to handle complex multi-dimensional data with AnimatablePair, and how to optimize animations to prevent main-thread bottlenecks. Whether you're building financial tickers, fitness indicators, or custom layout transitions, this skill provides the patterns and best practices needed to create fluid, production-grade motion.

Key Features

• Performance optimization strategies for avoiding main-thread layout recalculation
• Comprehensive reference for VectorArithmetic and mathematical interpolation logic
• 61 GitHub stars
• Implementation guidance for the Animatable protocol and multi-dimensional AnimatablePair
• Boilerplate reduction using the iOS 26 @Animatable macro and @AnimatableIgnored
• Debugging support for common animation failures such as discrete value types

Use Cases

• Debugging why specific view properties are not animating as expected during state changes
• Modernizing legacy animation code using the iOS 26 macro system to reduce boilerplate
• Creating custom animated shapes or complex layout transitions requiring frame-by-frame interpolation