---
title: "init(dataOfContentType:contentSize:createDataUsing:)"
framework: QuickLook UI
role: symbol
role_heading: Initializer
platforms: [macOS 12.0+]
path: "quicklookui/qlpreviewreply/init(dataofcontenttype:contentsize:createdatausing:)"
---

# init(dataOfContentType:contentSize:createDataUsing:)

## Declaration

```swift
convenience init(dataOfContentType contentType: UTType, contentSize: CGSize, createDataUsing closure: @escaping (QLPreviewReply) throws -> Data)
```