What is the benefit of the iOS 26 @Animatable macro?

The macro eliminates significant boilerplate by automatically generating Animatable protocol conformance and the animatableData property, reducing code by up to 40%.

Can I animate Integers in SwiftUI?

No, Integers do not conform to VectorArithmetic because they lack fractional intermediate values. To animate a number, use Float or Double and round it within your view's body.

Is custom Animatable conformance bad for performance?

It can be expensive because it triggers a body recalculation on every frame. This skill provides guidelines on when to use built-in modifiers versus custom conformance to maintain 60/120 FPS.

How do I animate multiple properties at once in a custom view?

You can use AnimatablePair to fuse multiple VectorArithmetic types into a single animatable attribute, or use the iOS 26 @Animatable macro to handle this automatically.

How do I bridge SwiftUI animations to UIKit?

Starting with iOS 18, you can use specific bridging APIs to apply SwiftUI animation curves and timing to UIViewRepresentable components and native UIKit views.

SwiftUI Animation Reference

Name: SwiftUI Animation Reference
Author: CharlesWiltgen

byCharlesWiltgen

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233

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Mobile Development

Implements high-performance SwiftUI animations using modern patterns, from foundational VectorArithmetic to the iOS 26 @Animatable macro.

axiom-swiftui-animation-ref is a specialized Claude Code skill designed to help developers master the SwiftUI animation system across all xOS platforms. It provides deep technical guidance on the Animatable protocol, interpolation mathematics, and the latest Swift macros for reducing boilerplate. Whether you are debugging complex layout transitions, bridging UIKit animations, or implementing physics-based spring motions, this skill offers battle-tested patterns for creating fluid, responsive user interfaces from iOS 13 through iOS 26.

Key Features

01Implementation patterns for iOS 18 zoom transitions and UIKit/AppKit animation bridging.

02Deep dives into VectorArithmetic for custom data types and multi-dimensional interpolation.

03Comprehensive guidance on the @Animatable macro (iOS 26+) and legacy Animatable protocols.

04Performance optimization strategies to prevent main-thread layout thrashing during animations.

05Best practices for choosing between spring physics and bezier timing curves.

06233 GitHub stars

Use Cases

01Debugging why specific properties (like Int) fail to animate in SwiftUI and providing Float-based solutions.

02Creating custom animated shapes and layout transitions for iOS, watchOS, and visionOS apps.

03Migrating legacy animation code to modern iOS 26 macro-based implementations to reduce boilerplate.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add charleswiltgen/axiom axiom-swiftui-animation-ref

For use in Claude.ai and ChatGPT

Download Skill