---
title: "managedObjectContextDidUnregisterObjects(with:)"
framework: coredata
role: symbol
role_heading: Instance Method
path: "coredata/nsincrementalstore/managedobjectcontextdidunregisterobjects(with:)"
---

# managedObjectContextDidUnregisterObjects(with:)

Indicates that objects identified by a given array of object IDs are no longer being used by a managed object context.

## Declaration

```swift
func managedObjectContextDidUnregisterObjects(with objectIDs: [NSManagedObjectID])
```

## Parameters

- `objectIDs`: An array of object IDs.

## Discussion

Discussion This method is the counterpart to managedObjectContextDidRegisterObjects(with:). Passing an object ID in the object IDs array of managedObjectContextDidRegisterObjects(with:) is akin to incrementing the object ID’s reference count by 1; passing an object ID in the object IDs array of managedObjectContextDidUnregisterObjects(with:) is akin to decrementing the object ID’s reference count by 1. It is only when an object ID’s reference count is 0 that no contexts indicate that they are using the corresponding managed object. (Object IDs start with a reference count of 0.) For example, if the register methods is invoked on two occasions when the object IDs array contains a given object ID, and the unregister method is invoked once when the object IDs array contains that object ID, then a context is still using the object with the given ID.

## See Also

### Responding to Context Changes

- [managedObjectContextDidRegisterObjects(with:)](coredata/nsincrementalstore/managedobjectcontextdidregisterobjects(with:).md)