# sharingService(_:transitionImageForShareItem:contentRect:) Invoked to allow returning a custom transition image when sharing an item. ``` @MainActor optional func sharingService(_ sharingService: NSSharingService, transitionImageForShareItem item: Any, contentRect: UnsafeMutablePointer) -> NSImage? ``` ## Parameters `sharingService` The sharing service. `item` The shared item. `contentRect` The content rectangle is the frame of the actual content inside the transition image, excluding all decorations. For example, if the transition image is a QuickLook thumbnail, the value would be `QLThumbnailGetContentRect`. ## Return Value The image to display for the sharing transition. Its size should exactly match that of the original image. ## Discussion A sample implementation of this method: ```objc - (NSImage *)sharingService:(NSSharingService *)sharingService transitionImageForShareItem:(id )item contentRect:(NSRect *)contentRect { if ([item isKindOfClass:[NSImage class]]) { return [_imageView image]; } } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)