---
title: "USDPreviewSession.Event.playbackStateChanged(isPlaying:)"
framework: spatialpreview
role: symbol
role_heading: Case
path: "spatialpreview/usdpreviewsession/event/playbackstatechanged(isplaying:)"
---

# USDPreviewSession.Event.playbackStateChanged(isPlaying:)

The USD’s animation playback state has changed

## Declaration

```swift
case playbackStateChanged(isPlaying: Bool)
```