---
title: selfSizingInvalidation
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uicollectionview/selfsizinginvalidation-swift.property
---

# selfSizingInvalidation

The mode that the collection view uses for invalidating the size of self-sizing cells.

## Declaration

```swift
var selfSizingInvalidation: UICollectionView.SelfSizingInvalidation { get set }
```

## Discussion

Discussion note: Session 10068: What’s new in UIKit

## See Also

### Resizing self-sizing cells

- [UICollectionView.SelfSizingInvalidation](uikit/uicollectionview/selfsizinginvalidation-swift.enum.md)