---
title: previewParametersProvider
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uitableviewdropplaceholder/previewparametersprovider
---

# previewParametersProvider

The handler block that provides the preview parameters for the specified cell.

## Declaration

```swift
var previewParametersProvider: ((UITableViewCell) -> UIDragPreviewParameters?)? { get set }
```

## Discussion

Discussion Specify a custom block when you want to provide a custom preview for your placeholder cell. If you don’t specify a block, the table view uses a default preview for the cell.