---
title: messageID
framework: coremidi
role: symbol
role_heading: Instance Property
path: coremidi/midinotification/messageid
---

# messageID

An identifier that describes the type of state change.

## Declaration

```swift
var messageID: MIDINotificationMessageID
```

## See Also

### Inspecting the Notification

- [MIDINotificationMessageID](coremidi/midinotificationmessageid.md)
- [messageSize](coremidi/midinotification/messagesize.md)