---
title: supplementaryViewProvider
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uicollectionviewdiffabledatasourcereference/supplementaryviewprovider
---

# supplementaryViewProvider

The closure that configures and returns the collection view’s supplementary views, such as headers and footers, from the diffable data source.

## Declaration

```swift
var supplementaryViewProvider: UICollectionViewDiffableDataSourceReferenceSupplementaryViewProvider? { get set }
```

## See Also

### Creating supplementary views

- [UICollectionViewDiffableDataSourceReferenceSupplementaryViewProvider](uikit/uicollectionviewdiffabledatasourcereferencesupplementaryviewprovider.md)