On Sep 23, 2013, at 11:14 AM, Ben Staveley-Taylor wrote: > Does anyone know how to get the volume ID number to use in a reference URL? > > I am working with file reference URLs as returned by - (NSURL > *)fileReferenceURL. These have this textual form: > > file:///.file/id=<volume_id>.<file_id>/ > e.g. file:///.file/id=6571367.2773272/ > > I want to compose a reference URL for a file whose file_id I know.
Why would you want to do that? In any case, it's not supported. From "NSURL and CFURL Release Notes: File Reference URLs" <https://developer.apple.com/library/mac/releasenotes/Cocoa/RN-NSURL/#//apple_ref/doc/uid/TP40007753-CH1-DontLinkElementID_2>: "The syntax of a file reference URL should be considered opaque, and may change from release to release." > I know the textual path of the volume it is on (e.g "/Volumes/Bob"). I can't > figure out how to get the volume ID to use from the volume name or path I hesitate to suggest this, but have you tried creating an NSURL for a file path on the volume and then asking it for its file-reference-URL form? > So far I have tried > > NSURL *vol = [NSURL urlWithString:@"/Volumes/Bob"]; > id volId; > > [vol getResourceValue:&volId > forKey: NSURLVolumeIdentifierKey > error:&err]; > > But can't see how to use the opaque volId object result; It's opaque by design. It's only useful for comparing to another volume's identifier with -isEqual:. That's it. It's for when you have two URL objects and you want to determine if they're on the same volume. -Ken _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
