# KeyframeTrackContentBuilder The builder that creates keyframe track content from the keyframes that you define within a closure. ``` @resultBuilder struct KeyframeTrackContentBuilder where Value : Animatable ``` ## Topics ### Building keyframe track content [`static func buildArray([some KeyframeTrackContent]) -> some KeyframeTrackContent`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildArray(_:)) [`static func buildBlock() -> some KeyframeTrackContent`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildBlock()) [`static func buildEither(first: First) -> KeyframeTrackContentBuilder.Conditional`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildEither(first:)) [`static func buildEither(second: Second) -> KeyframeTrackContentBuilder.Conditional`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildEither(second:)) [`static func buildExpression(K) -> K`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildExpression(_:)) [`static func buildPartialBlock(accumulated: some KeyframeTrackContent, next: some KeyframeTrackContent) -> some KeyframeTrackContent`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildPartialBlock(accumulated:next:)) [`static func buildPartialBlock(first: K) -> K`](/documentation/SwiftUI/KeyframeTrackContentBuilder/buildPartialBlock(first:)) [`struct Conditional`](/documentation/SwiftUI/KeyframeTrackContentBuilder/Conditional) A conditional result from the result builder. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)