Invoked to return an array of filenames that the receiver promises to create.
- macOS 10.6–10.13Deprecated
The collection view that send the message.
The drop location where the files are created.
The indexes of the dragging items.
An array of filenames (not full paths) for the created files that the receiver promises to create.
The delegate can support file promise drags by adding NSFilesPromisePboardType to the pasteboard in
For more information on file promise dragging, see documentation for the NSDraggingSource protocol and
You do not need to implement this delegate method for your collection view to be a drag source.