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# WidgetCenter.UserInfoKey

An object that defines keys for accessing information in a user info dictionary.

```
struct UserInfoKey
```

## Overview> Note: In Objective-C, use ``doc://com.apple.WidgetKit/documentation/WidgetKit/WGWidgetUserInfoKeyFamily`` and
> ``doc://com.apple.WidgetKit/documentation/WidgetKit/WGWidgetUserInfoKeyKind`` instead.

## Topics

### Describing a widget

[`family`](/documentation/WidgetKit/WidgetCenter/UserInfoKey/family)

A key you use to access the widget’s family.

[`kind`](/documentation/WidgetKit/WidgetCenter/UserInfoKey/kind)

A key you use to access the widget’s kind. The value matches the `kind`
property specified in the widget’s configuration.

### Describing a Live Activity

[`activityID`](/documentation/WidgetKit/WidgetCenter/UserInfoKey/activityID)

A key you use to access the activity ID if the widget represents a
Live Activity.


---

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