---
title: didExposeNotification
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nswindow/didexposenotification
---

# didExposeNotification

A notification that a window exposed a portion of its nonretained content.

## Declaration

```swift
class let didExposeNotification: NSNotification.Name
```

## Discussion

Discussion The system posts this notification when a window moves in front of other windows or when other windows move from in front of it, exposing part of its content. The notification object is the NSWindow object that has exposes its content. In the notification’s userInfo dictionary, the key NSExposedRect specifies an NSValue object that contains the rectangle the window exposed. To observe this notification using Swift concurrency, use NSWindow.DidExposeMessage.

## See Also

### Notifications

- [didBecomeKeyNotification](appkit/nswindow/didbecomekeynotification.md)
- [didBecomeMainNotification](appkit/nswindow/didbecomemainnotification.md)
- [didChangeScreenNotification](appkit/nswindow/didchangescreennotification.md)
- [didChangeScreenProfileNotification](appkit/nswindow/didchangescreenprofilenotification.md)
- [didDeminiaturizeNotification](appkit/nswindow/diddeminiaturizenotification.md)
- [didEndSheetNotification](appkit/nswindow/didendsheetnotification.md)
- [didEndLiveResizeNotification](appkit/nswindow/didendliveresizenotification.md)
- [didMiniaturizeNotification](appkit/nswindow/didminiaturizenotification.md)
- [didMoveNotification](appkit/nswindow/didmovenotification.md)
- [didResignKeyNotification](appkit/nswindow/didresignkeynotification.md)
- [didResignMainNotification](appkit/nswindow/didresignmainnotification.md)
- [didResizeNotification](appkit/nswindow/didresizenotification.md)
- [didUpdateNotification](appkit/nswindow/didupdatenotification.md)
- [willBeginSheetNotification](appkit/nswindow/willbeginsheetnotification.md)
- [willCloseNotification](appkit/nswindow/willclosenotification.md)