The 2 Must-Know Protocols for SwiftUI Animation

Animatable and AnimatableModifier are essentials to create SwiftUI animations

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When using SwiftUI, it’s important to animate views and transitions with silky smooth performance. This article introduces the two protocols for SwiftUI animation that every developer must know.

1. The Animatable Protocol

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The Animatable protocol is available on iOS 13+. It defines the type that can be animated. The only value the protocol contains is animatableData which is the associated type of VectorArithmetic. VectorArithmetic extends the AdditiveArithmetic protocol with scalar multiplication and a way to query the vector magnitude of the value. The Animatable protocol helps us in animating paths and transforming matrices.

SwiftUI traverses the view hierarchy to find the values adopt Animatable protocol and…