<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "UIKit",
  "identifier" : "/documentation/UIKit/UISheetPresentationControllerDelegate",
  "metadataVersion" : "0.1.0",
  "role" : "Protocol",
  "symbol" : {
    "kind" : "Protocol",
    "modules" : [
      "UIKit"
    ],
    "preciseIdentifier" : "c:objc(pl)UISheetPresentationControllerDelegate"
  },
  "title" : "UISheetPresentationControllerDelegate"
}
-->

# UISheetPresentationControllerDelegate

The interface that an object implements to respond to size changes in a sheet presentation controller.

```
@MainActor protocol UISheetPresentationControllerDelegate : UIAdaptivePresentationControllerDelegate
```

## Topics

### Resizing the Sheet Presentation Controller

[`func sheetPresentationControllerDidChangeSelectedDetentIdentifier(UISheetPresentationController)`](/documentation/UIKit/UISheetPresentationControllerDelegate/sheetPresentationControllerDidChangeSelectedDetentIdentifier(_:))

Provides an opportunity to respond after the sheet presentation controller’s selected detent changes.

## Relationships

### Inherits From

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`UIAdaptivePresentationControllerDelegate`](/documentation/UIKit/UIAdaptivePresentationControllerDelegate)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)