---
title: interstitialEventIdentifier
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avplayeritem/interstitialeventidentifier
---

# interstitialEventIdentifier

The identifier of the AVPlayerInterstitialEvent that created this item, or nil if the item was not created from an interstitial event.

## Declaration

```swift
nonisolated var interstitialEventIdentifier: String? { get }
```