---
title: activityIdentifier
framework: Accessory Live Activities
role: symbol
role_heading: Instance Property
platforms: [iOS 26.5+, iPadOS 26.5+]
path: accessoryliveactivities/accessoryliveactivity/activityidentifier
---

# activityIdentifier

A string that uniquely identifies the Live Activity.

## Declaration

```swift
let activityIdentifier: String
```

## See Also

### Identifying the activity

- [sourceBundleIdentifier](accessoryliveactivities/accessoryliveactivity/sourcebundleidentifier.md)
- [sourceBundleName](accessoryliveactivities/accessoryliveactivity/sourcebundlename.md)