---
title: delegate
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uipreviewinteraction/delegate
---

# delegate

An object that acts as the delegate of the preview interaction.

## Declaration

```swift
weak var delegate: (any UIPreviewInteractionDelegate)? { get set }
```

## Discussion

Discussion The preview interaction informs the delegate of state and progress changes throughout the 3D Touch process. Create an object that conforms to the UIPreviewInteractionDelegate protocol and assign it to this property.

## See Also

### Preparing preview interactions

- [UIPreviewInteractionDelegate](uikit/uipreviewinteractiondelegate.md)