# changedIndexes The indexes of objects in the fetch result whose content or metadata have been updated. ``` var changedIndexes: IndexSet? { get } ``` ## Discussion Use this index set to update elements in a collection view or similar user interface that displays the contents of the fetch result. These indexes are relative to the original fetch result (the [`fetchResultBeforeChanges`](/documentation/Photos/PHFetchResultChangeDetails/fetchResultBeforeChanges) property) after you’ve applied the changes described by the [`removedIndexes`](/documentation/Photos/PHFetchResultChangeDetails/removedIndexes) and [`insertedIndexes`](/documentation/Photos/PHFetchResultChangeDetails/insertedIndexes) properties; when updating your app’s interface, apply changes after removals and insertions and before moves. > Warning: > Don’t map `changedIndexes` directly to item indices in batch updates. Use these indices to reconfigure the corresponding cells after . and expect the `changedIndexes` to be in the *before* state, while PhotoKit provides them in the *after* state, resulting in a crash if your app performs insertions and deletions at the same time as the changes. If the [`hasIncrementalChanges`](/documentation/Photos/PHFetchResultChangeDetails/hasIncrementalChanges) property’s value is `false`, this property’s value is `nil`. --- 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)