---
title: externalMediaContentIdentifier
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/nsuseractivity/externalmediacontentidentifier
---

# externalMediaContentIdentifier

A unique identifier from the app’s media content catalog for the currently displayed media item.

## Declaration

```swift
var externalMediaContentIdentifier: String? { get set }
```

## See Also

### Specifying app identifiers

- [appEntityIdentifier](foundation/nsuseractivity/appentityidentifier.md)
- [targetContentIdentifier](foundation/nsuseractivity/targetcontentidentifier.md)