> On Mar 14, 2016, at 2:24 AM, Rick C. <rickcort...@gmail.com> wrote: > > My problem is I’m only getting a kMDItemLastUsedDate on about 10% of files I > check,
I don’t know whether that attribute is wired up to the filesystem, or whether it’s just something that has to be manually updated by app/framework code. From what you’re saying, it sounds like the latter; it may be that it has to be bumped by e.g. NSDocument when it opens a document. > even though I always get a value for NSFileModificationDate it still doesn’t > seem to always be the true last used date. That’s the time the file was last _modified_, not the last time it was _read_. > For example looking at how Path Finder does it they have an Attribute tag > that seems to more correctly give the last date file was used. Any input > here would be appreciated thanks in advance… Unix filesystems do keep a last-accessed date for files, but it looks like NSFileManager doesn’t expose an attribute for it. You can call stat() and get the st_atimespec field of the result. This value may not be as useful as you like, however, because it gets bumped any time the file is opened or read from. So I would imagine that background processes like Spotlight indexers and Time Machine will touch it, as well as Quick Look thumbnail generators. —Jens _______________________________________________ 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
