---
title: SupportedActivityFamiliesEnvironmentKey
framework: widgetkit
role: symbol
role_heading: Structure
path: widgetkit/supportedactivityfamiliesenvironmentkey
---

# SupportedActivityFamiliesEnvironmentKey

An environment key for the size of a rendered Live Activity.

## Declaration

```swift
struct SupportedActivityFamiliesEnvironmentKey
```

## Overview

Overview To detect the currently rendered activity family size, use the activityFamily environment variable.

## Relationships

### Conforms To

- [EnvironmentKey](swiftui/environmentkey.md)