---
title: NSOutlineView.ColumnDidResizeMessage
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nsoutlineview/columndidresizemessage
---

# NSOutlineView.ColumnDidResizeMessage

## Declaration

```swift
struct ColumnDidResizeMessage
```

## Topics

### Initializers

- [init(outlineView:tableColumn:oldWidth:)](appkit/nsoutlineview/columndidresizemessage/init(outlineview:tablecolumn:oldwidth:).md)

### Instance Properties

- [oldWidth](appkit/nsoutlineview/columndidresizemessage/oldwidth.md)
- [outlineView](appkit/nsoutlineview/columndidresizemessage/outlineview.md)
- [tableColumn](appkit/nsoutlineview/columndidresizemessage/tablecolumn.md)

## Relationships

### Conforms To

- [NotificationCenter.MainActorMessage](foundation/notificationcenter/mainactormessage.md)
- [SendableMetatype](swift/sendablemetatype.md)