---
title: NSSplitView.WillResizeSubviewsMessage
framework: appkit
role: symbol
role_heading: Structure
path: appkit/nssplitview/willresizesubviewsmessage
---

# NSSplitView.WillResizeSubviewsMessage

## Declaration

```swift
struct WillResizeSubviewsMessage
```

## Topics

### Initializers

- [init(splitView:dividerIndex:userResize:)](appkit/nssplitview/willresizesubviewsmessage/init(splitview:dividerindex:userresize:).md)

### Instance Properties

- [dividerIndex](appkit/nssplitview/willresizesubviewsmessage/dividerindex.md)
- [splitView](appkit/nssplitview/willresizesubviewsmessage/splitview.md)
- [userResize](appkit/nssplitview/willresizesubviewsmessage/userresize.md)

## Relationships

### Conforms To

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