---
title: invalidateDetents()
framework: uikit
role: symbol
role_heading: Instance Method
path: uikit/uisheetpresentationcontroller/invalidatedetents()
---

# invalidateDetents()

Notifies the sheet to re-evaluate its detent value in the next layout pass.

## Declaration

```swift
func invalidateDetents()
```

## Discussion

Discussion When an external input (like a captured property) to a custom detent changes, call this method to notify the sheet to re-evaluate the detent. To animate custom detents to their new heights, call this method within animateChanges(_:). note: You don’t need to call this method if detents only contains system detents, or if your custom detents only use information from the passed-in context.