---
title: identifier
framework: usernotifications
role: symbol
role_heading: Instance Property
path: usernotifications/unnotificationaction/identifier
---

# identifier

The unique string that your app uses to identify the action.

## Declaration

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

## Discussion

Discussion When the user selects an action, the system reports the value of this string to your app. Because your app handles all actions by using a single delegate method, the identifier strings for all of your app’s actions must be unique.

## See Also

### Getting Information

- [title](usernotifications/unnotificationaction/title.md)
- [icon](usernotifications/unnotificationaction/icon.md)