---
title: setNeedsUpdateOfVerticalBarConfiguration()
framework: UIKit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.1+, iPadOS 27.1+]
path: uikit/uiviewcontroller/setneedsupdateofverticalbarconfiguration()
---

# setNeedsUpdateOfVerticalBarConfiguration()

Signals to the system that the preferred vertical bar configuration, such as its behavior, has changed.

## Declaration

```swift
func setNeedsUpdateOfVerticalBarConfiguration()
```

## Discussion

Discussion Call this method following changes to any state that affects the return values of methods like preferredVerticalBarBehavior or childForPreferredVerticalBarBehavior.

## See Also

### Configuring bars on the vertical axis

- [preferredVerticalBarBehavior](uikit/uiviewcontroller/preferredverticalbarbehavior.md)
- [UIVerticalBarBehavior](uikit/uiverticalbarbehavior.md)
- [childForPreferredVerticalBarBehavior](uikit/uiviewcontroller/childforpreferredverticalbarbehavior.md)