---
title: "init(version:sizeOfDataBlock:offsetToTextLayouts:offsetToStyleRuns:offsetToStyleList:)"
framework: Application Services
role: symbol
role_heading: Initializer
platforms: [Mac Catalyst 13.0+, macOS 10.9+, xcode 9.0+]
path: applicationservices/atsflatdatamainheaderblock/1461857-init
---

# init(version:sizeOfDataBlock:offsetToTextLayouts:offsetToStyleRuns:offsetToStyleList:)

## Declaration

```swift
init(version: UInt32, sizeOfDataBlock: UInt32, offsetToTextLayouts: UInt32, offsetToStyleRuns: UInt32, offsetToStyleList: UInt32)
```