> On Feb 6, 2015, at 11:55 AM, Jonathan Mitchell <jonat...@mugginsoft.com> > wrote: > > The tableView.delegate is not a zeroing weak ref - in the lingo of ARC it is > unsafe_unretained I believe > self can be deallocated leaving tableView.delegate as a dangling pointer.
This is still a weak reference, it's just unsafe (non-zeroing.) You're right that these need to be cleaned up manually. Come to think of it, I'm surprised that AppKit delegates are still unsafe-unretained. Why haven't these been converted to safe weak references yet? > The problem is that there is, I believe, no way to accurately determine > whether a or b is true in any particular instance! It depends on the class. For example, NSURLConnection has a well-defined order in which it sends delegate messages, so it's possible to know when it's not going to send any more messages. But yeah, in a window's view hierarchy it's extremely unpredictable so it's important to zero out delegate references. —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
