---
title: "init(collectionView:itemProvider:)"
framework: appkit
role: symbol
role_heading: Initializer
path: "appkit/nscollectionviewdiffabledatasourcereference/init(collectionview:itemprovider:)"
---

# init(collectionView:itemProvider:)

Creates a diffable data source with the specified item provider, and connects it to the specified collection view.

## Declaration

```swift
init(collectionView: NSCollectionView, itemProvider: @escaping NSCollectionViewDiffableDataSourceReferenceItemProvider)
```

## Parameters

- `collectionView`: The initialized collection view object to connect to the diffable data source.
- `itemProvider`: A closure that creates and returns each of the items for the collection view from the data the diffable data source provides.

## See Also

### Creating a Diffable Data Source

- [NSCollectionViewDiffableDataSourceReferenceItemProvider](appkit/nscollectionviewdiffabledatasourcereferenceitemprovider.md)