---
title: persistentIdentifier
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uiscenesession/persistentidentifier
---

# persistentIdentifier

A unique identifier that persists for the lifetime of the session.

## Declaration

```swift
var persistentIdentifier: String { get }
```

## Discussion

Discussion Use the value of this property as a unique identifier for the session and its accompanying scene.