# NSManagedObjectContext.ObjectsDidChangeMessage Posted when objects in a main queue context change (inserted, updated, deleted, refreshed, or invalidated). ``` struct ObjectsDidChangeMessage ``` ## Overview Only use this message type for contexts with `NSMainQueueConcurrencyType`. ## Topics ### Instance Properties [`let context: NSManagedObjectContext`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/context) [`var deleted: Set`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/deleted) Objects that were deleted. [`var inserted: Set`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/inserted) Objects that were inserted. [`var invalidated: Set`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/invalidated) Objects that were invalidated. [`let invalidatedAll: Bool?`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/invalidatedAll) True if all objects in the context were invalidated. [`var refreshed: Set`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/refreshed) Objects that were refreshed. [`var updated: Set`](/documentation/CoreData/NSManagedObjectContext/ObjectsDidChangeMessage/updated) Objects that were updated. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`MainActorMessage`](/documentation/Foundation/NotificationCenter/MainActorMessage) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)