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# SCNAnimationEvent

A container for a closure, a block in Objective-C, to be executed at a specific time during playback of an animation.

```
class SCNAnimationEvent
```

## Overview

Use animation events to add actions to animations, such as playing a sound to coincide with the movement of an animated character, or removing a node from the scene after playing an animation that fades out its visible geometry.

After you create an animation event, you attach it to an animation object using the object’s <doc://com.apple.documentation/documentation/QuartzCore/CAAnimation/animationEvents> property.

## Topics

### Creating an Animation Event

[`init(keyTime:block:)`](/documentation/SceneKit/SCNAnimationEvent/init(keyTime:block:))

Creates an animation event.

### Constants

[`SCNAnimationEventBlock`](/documentation/SceneKit/SCNAnimationEventBlock)

Signature for the block called when an animation event triggers.


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