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# configuration

A change that invalidates a view’s configuration.

```
static var configuration: UIView.Invalidations.Configuration { get }
```

## Discussion

Use this invalidation type to call [`setNeedsUpdateConfiguration()`](/documentation/UIKit/UIButton/setNeedsUpdateConfiguration()) when a change in property value should cause the containing view to update the configuration.

> Note:
> You only use this invalidation type on ``doc://com.apple.uikit/documentation/UIKit/UIView`` subclasses that support a configuration pattern, using ``doc://com.apple.uikit/documentation/UIKit/UIButton/setNeedsUpdateConfiguration()`` and ``doc://com.apple.uikit/documentation/UIKit/UIButton/updateConfiguration()`` pattern. For example, use this type on ``doc://com.apple.uikit/documentation/UIKit/UIButton``, ``doc://com.apple.uikit/documentation/UIKit/UICollectionViewCell``, ``doc://com.apple.uikit/documentation/UIKit/UITableViewCell``, or ``doc://com.apple.uikit/documentation/UIKit/UITableViewHeaderFooterView``. This type has no effect on ``doc://com.apple.uikit/documentation/UIKit/UIView`` subclasses that don’t use a configuration pattern.

---

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