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# categories

The app’s registered groups of actions.

```
var categories: Set<UIUserNotificationCategory>? { get }
```

## Discussion

This property contains the [`UIUserNotificationCategory`](/documentation/UIKit/UIUserNotificationCategory) objects that you specified when creating the settings object. Each object corresponds to a group of actions that may be displayed in conjunction with a push notification. After registration, this property contains the set of actions you specified in your initial request.

## See Also

[`init(types:categories:)`](/documentation/UIKit/UIUserNotificationSettings/init(types:categories:))

Creates and returns a settings object that you can use to register your requested notification and action types.


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