On Sep 23, 2014, at 4:24 PM, Rick Mann <rm...@latencyzero.com> wrote:
> 
> In iOS 7, my app works fine. In iOS 8, deleting an entity eventually works, 
> but whereas in iOS 7 my UI would update and show the change, the change 
> doesn't seem to have "taken hold" by this time in iOS 8.
> 
> Basically, when the user deletes an entity, I delete it from the MOC (main 
> thread), then mark my custom view as needing display. Its -drawRect: is 
> called, but when it asks the owning entity for the set of related entities it 
> draws, that set comes back with the deleted items still present (although 
> they return true for -isDeleted).
> 
> When a later event causes the custom view to refresh again, the entity 
> representations finally go away.
> 
> Has something changed in delete propagation between iOS 7 and 8?

Have you checked the value of your MOC’s propagatesDeletesAtEndOfEvent property 
on iOS 7 and iOS 8?

But more fundamentally, why aren’t you listening for 
NSManagedObjectContextObjectsDidChangeNotification to trigger your UI updates?

--Kyle Sluder

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