---
title: AVAudioUnitComponent.TagsDidChangeMessage
framework: avfaudio
role: symbol
role_heading: Structure
path: avfaudio/avaudiounitcomponent/tagsdidchangemessage
---

# AVAudioUnitComponent.TagsDidChangeMessage

Type-safe notification message for audio unit component tag changes.

## Declaration

```swift
struct TagsDidChangeMessage
```

## Overview

Overview This notification is posted when the user tags of an audio unit component are modified. The notification object is the AVAudioUnitComponent whose tags changed. note: User tags are only supported on macOS.

## Relationships

### Conforms To

- [NotificationCenter.AsyncMessage](foundation/notificationcenter/asyncmessage.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)