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# NSFileProviderChangeObserver

An observer that receives changes and deletions during enumeration.

```
protocol NSFileProviderChangeObserver : NSObjectProtocol
```

## Topics

### Observing Changes

[`didDeleteItems(withIdentifiers:)`](/documentation/FileProvider/NSFileProviderChangeObserver/didDeleteItems(withIdentifiers:))

Tells the observer that the specified items have been deleted.

[`didUpdate(_:)`](/documentation/FileProvider/NSFileProviderChangeObserver/didUpdate(_:))

Tells the observer that the specified items have been updated.

[`finishEnumeratingChanges(upTo:moreComing:)`](/documentation/FileProvider/NSFileProviderChangeObserver/finishEnumeratingChanges(upTo:moreComing:))

Tells the observer that all of the changes have been enumerated up to the specified sync anchor.

[`finishEnumeratingWithError(_:)`](/documentation/FileProvider/NSFileProviderChangeObserver/finishEnumeratingWithError(_:))

Tells the observer that an error occurred during change notification.

[`suggestedBatchSize`](/documentation/FileProvider/NSFileProviderChangeObserver/suggestedBatchSize)

The batch size that the system recommends.


---

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