On Dec 2, 2015, at 12:24 AM, Luther Baker wrote: > The conversation here is pretty loose ... and so everyone might be right in > what they are intending to convey... ;-) but I thought I'd just put in a vote > to stop using the term "Singleton" for this access pattern. It isn't a > Singleton (unless there is historical signficance that grandfathers this > incorrect term in) and I think that using the term loosely in this case > actually weakens the power of a pattern vocabulary a bit. > > Unless you're doing something we can't see (which is possible), it is > unlikely you are actually creating a Singleton. It is more likely that you > are creating class methods that in some/many/most/all cases - are accessing > private static instances. Similar in form to ... > > [NSUserDefaults standardUserDefaults] > [NSNotificationCenter defaultCenter] > > Neither NSApplication, NSUserDefaults nor NSNotificationCenter technically > adhere to the Singleton pattern -- although everyone labels this technique as > such. > > https://en.wikipedia.org/wiki/Singleton_pattern
Yeah, but are the "effectively singletons"? > > Alex, the API uses lots of different words to grab a-hold of the so-called > "standard", "default" or "shared" static instance. Unfortunately, I'm not > aware of any docs that specify when to use which adjective or if any one > particular adjective should be used when creating a real Singleton ... since > none of these are! I just remember looking into Apple's implemented conventions on this last week in iOS and didn't have time to fully look this up. It's just what I noticed they were doing in a few areas that escape me at the moment. Except for the application delegate, which does use sharedApplication as its accessor. Cheers. _______________________________________________ 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