# collectionView(_:canDragItemsAt:with:) Returns a Boolean indicating whether a drag operation involving the specified items can begin. ``` @MainActor optional func collectionView(_ collectionView: NSCollectionView, canDragItemsAt indexPaths: Set, with event: NSEvent) -> Bool ``` ## Parameters `collectionView` The collection view making the request. `indexPaths` The index paths of the items about to be dragged. `event` The mouse-down event that began the drag operation. ## Return Value if the drag operation can begin or if it cannot. ## Discussion If you do not implement this method and your collection view has only one section, the collection view calls the legacy [`collectionView(_:canDragItemsAt:with:)`](/documentation/AppKit/NSCollectionViewDelegate/collectionView(_:canDragItemsAt:with:)-39rjh) method. If you do not implement either method, the collection view assumes a return value of . --- 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)