willSaveObjectsNotification
A notification that posts before a context writes pending changes to disk.
Declaration
static let willSaveObjectsNotification: Notification.NameDiscussion
This notification’s object is the context that’s about to save. Only use the notification to operate on the in-process save operation. For example, to insert additional managed objects. Don’t peform any asynchronous work or block the calling thread. NSManagedObjectContext posts notifications to the same thread that creates it.
There is no userInfo dictionary.
See Also
Managing notifications
didChangeObjectsNotificationNSManagedObjectContextObjectsDidChangedidSaveObjectsNotificationNSManagedObjectContextDidSaveNSManagedObjectContextWillSaveNSInsertedObjectsKeyNSUpdatedObjectsKeyNSDeletedObjectsKeyNSRefreshedObjectsKeyNSInvalidatedObjectsKeyNSInvalidatedAllObjectsKeydidMergeChangesObjectIDsNotificationdidSaveObjectIDsNotificationNSManagedObjectContext.NotificationKey