---
title: invalidatedSupplementaryIndexPaths
framework: appkit
role: symbol
role_heading: Instance Property
path: appkit/nscollectionviewlayoutinvalidationcontext/invalidatedsupplementaryindexpaths
---

# invalidatedSupplementaryIndexPaths

A dictionary containing the supplementary views whose layout attributes are invalid.

## Declaration

```swift
var invalidatedSupplementaryIndexPaths: [NSCollectionView.SupplementaryElementKind : Set<IndexPath>]? { get }
```

## Discussion

Discussion The keys in this dictionary are the element kind strings of the supplementary views. The value for each key is an NSSet object containing one or more NSIndexPath objects, each of which identifies the section containing the supplementary view.

## See Also

### Invalidating Specific Items

- [invalidateItems(at:)](appkit/nscollectionviewlayoutinvalidationcontext/invalidateitems(at:).md)
- [invalidateSupplementaryElements(ofKind:at:)](appkit/nscollectionviewlayoutinvalidationcontext/invalidatesupplementaryelements(ofkind:at:).md)
- [invalidateDecorationElements(ofKind:at:)](appkit/nscollectionviewlayoutinvalidationcontext/invalidatedecorationelements(ofkind:at:).md)
- [invalidatedItemIndexPaths](appkit/nscollectionviewlayoutinvalidationcontext/invalidateditemindexpaths.md)
- [invalidatedDecorationIndexPaths](appkit/nscollectionviewlayoutinvalidationcontext/invalidateddecorationindexpaths.md)