---
title: NSInvalidatedObjectsKey
framework: coredata
role: symbol
role_heading: Global Variable
path: coredata/nsinvalidatedobjectskey
---

# NSInvalidatedObjectsKey

A key for the set of objects that were invalidated.

## Declaration

```swift
let NSInvalidatedObjectsKey: String
```

## See Also

### Managing notifications

- [didChangeObjectsNotification](coredata/nsmanagedobjectcontext/didchangeobjectsnotification.md)
- [NSManagedObjectContextObjectsDidChange](foundation/nsnotification/name-swift.struct/nsmanagedobjectcontextobjectsdidchange.md)
- [didSaveObjectsNotification](coredata/nsmanagedobjectcontext/didsaveobjectsnotification.md)
- [NSManagedObjectContextDidSave](foundation/nsnotification/name-swift.struct/nsmanagedobjectcontextdidsave.md)
- [willSaveObjectsNotification](coredata/nsmanagedobjectcontext/willsaveobjectsnotification.md)
- [NSManagedObjectContextWillSave](foundation/nsnotification/name-swift.struct/nsmanagedobjectcontextwillsave.md)
- [NSInsertedObjectsKey](coredata/nsinsertedobjectskey.md)
- [NSUpdatedObjectsKey](coredata/nsupdatedobjectskey.md)
- [NSDeletedObjectsKey](coredata/nsdeletedobjectskey.md)
- [NSRefreshedObjectsKey](coredata/nsrefreshedobjectskey.md)
- [NSInvalidatedAllObjectsKey](coredata/nsinvalidatedallobjectskey.md)
- [didMergeChangesObjectIDsNotification](coredata/nsmanagedobjectcontext/didmergechangesobjectidsnotification.md)
- [didSaveObjectIDsNotification](coredata/nsmanagedobjectcontext/didsaveobjectidsnotification.md)
- [NSManagedObjectContext.NotificationKey](coredata/nsmanagedobjectcontext/notificationkey.md)