# invalidatedItemIndexPaths The set of items whose layout attributes are invalid. ``` var invalidatedItemIndexPaths: Set? { get } ``` ## Discussion The set contains zero or more objects, each of which identifies an invalid item. --- 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)