---
title: CKShareThumbnailImageDataKey
framework: CloudKit
role: symbol
role_heading: Global Variable
platforms: [iOS 10.0+, iPadOS 10.0+, Mac Catalyst 13.1+, macOS 10.12+, tvOS 10.0+, watchOS 3.0+]
path: cloudkit/cksharethumbnailimagedatakey-rxjd
---

# CKShareThumbnailImageDataKey

## Declaration

```swift
@nonobjc let CKShareThumbnailImageDataKey: String
```