# withAnimation(_:completionCriteria:_:completion:) Returns the result of recomputing the view’s body with the provided animation, and runs the completion when all animations are complete. ``` func withAnimation(_ animation: Animation? = .default, completionCriteria: AnimationCompletionCriteria = .logicallyComplete, _ body: () throws -> Result, completion: @escaping () -> Void) rethrows -> Result ``` ## Discussion This function sets the given [`Animation`](/documentation/SwiftUI/Animation) as the [`animation`](/documentation/SwiftUI/Transaction/animation) property of the thread’s current [`Transaction`](/documentation/SwiftUI/Transaction) as well as calling `Transaction/addAnimationCompletion` with the specified completion. The completion callback will always be fired exactly one time. If no animations are created by the changes in `body`, then the callback will be called immediately after `body`. --- 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)