On Wed, 15 Feb 2012 13:56:14 -0800, Kyle Sluder <[email protected]> said: >On Wed, Feb 15, 2012 at 11:19 AM, Matt Neuburg <[email protected]> wrote: >> My question is simply this: in a world that has GCD, is there any reason why >> we wouldn't have "queue" be a GCD dispatch queue (probably the main queue) >> and call dispatch_asynch? Putting it even more generally (and this is >> probably my *real* question), is there any reason why I'd ever use >> NSOperationQueue's addOperationWithBlock given the existence of GCD? > >NSOperationQueue exists at a higher conceptual level than GCD. You can >observe the status of NSOperations, add completion handlers or drive >multiple blocks with one operation, set priority and ordering >restrictions on them, limit the number of operations executing >concurrently on an NSOperationQueue, and cancel in-flight operations. > >On iOS, NSOperationQueue doesn't use GCD at all. On Mac OS X 10.6 and >greater, block-based NSOperations are submitted to global >(asynchronous) dispatch queue.
Very useful; thanks to all who responded. m. -- matt neuburg, phd = [email protected], <http://www.apeth.net/matt/> A fool + a tool + an autorelease pool = cool! Programming iOS 5! http://shop.oreilly.com/product/0636920023562.do _______________________________________________ Cocoa-dev mailing list ([email protected]) 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 [email protected]
