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# UICollectionView.SelfSizingInvalidation

Constants that describe modes for invalidating the size of self-sizing collection view cells.

```
enum SelfSizingInvalidation
```

## Discussion

Use these constants with the [`selfSizingInvalidation`](/documentation/UIKit/UICollectionView/selfSizingInvalidation-swift.property) property.

## Topics

### Constants

[`case disabled`](/documentation/UIKit/UICollectionView/SelfSizingInvalidation-swift.enum/disabled)

A mode that disables self-sizing invalidation.

[`case enabled`](/documentation/UIKit/UICollectionView/SelfSizingInvalidation-swift.enum/enabled)

A mode that enables manual self-sizing invalidation.

[`case enabledIncludingConstraints`](/documentation/UIKit/UICollectionView/SelfSizingInvalidation-swift.enum/enabledIncludingConstraints)

A mode that enables automatic self-sizing invalidation after Auto Layout changes.

### Initializers

[`init?(rawValue: Int)`](/documentation/UIKit/UICollectionView/SelfSizingInvalidation-swift.enum/init(rawValue:))

## Relationships

### Conforms To

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`Sendable`](/documentation/Swift/Sendable)

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

---

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