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# updateConfiguration()

Updates the button configuration in response to a button state change.

```
func updateConfiguration()
```

## Discussion

Override this method in your subclass to respond changes to the button’s state. Make any necessary changes and update the button’s configuration.

Don’t call this method directly. Call [`setNeedsUpdateConfiguration()`](/documentation/UIKit/UIButton/setNeedsUpdateConfiguration()) to request an update to your button.

In iOS 18 and later, UIKit supports automatic trait tracking inside this method for traits from this button’s `traitCollection`. For more information, see [Automatic trait tracking](/documentation/UIKit/automatic-trait-tracking).

This method supports automatic observation tracking. For more information, see [Updating views automatically with observation tracking in UIKit](/documentation/UIKit/updating-views-automatically-with-observation-tracking-in-uikit).

---

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