willBeginSheetNotification
A notification that the window object is about to open a sheet.
Declaration
class let willBeginSheetNotification: NSNotification.NameDiscussion
The notification object is the NSWindow object that’s about to open the sheet. This notification doesn’t contain a userInfo dictionary.
To observe this notification using Swift concurrency, use NSWindow.WillBeginSheetMessage.
See Also
Notifications
didBecomeKeyNotificationdidBecomeMainNotificationdidChangeScreenNotificationdidChangeScreenProfileNotificationdidDeminiaturizeNotificationdidEndSheetNotificationdidEndLiveResizeNotificationdidExposeNotificationdidMiniaturizeNotificationdidMoveNotificationdidResignKeyNotificationdidResignMainNotificationdidResizeNotificationdidUpdateNotificationwillCloseNotification