Updated core data concurrency documentation?

Question

The only (and most recent) results I'm finding about best practices are here: https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/CoreData/Articles/cdConcurrency.html

However, the very top of the page says,

"Important: Best practices for concurrency with Core Data have changed dramatically since this document was written; please note that this chapter does not represent current recommendations."

Where can I find more current documentation for concurrency with core data?

Answer 1

The best discussion is now under 'Concurrency' within the NSManagedObjectContext documentation.

My summary:

Thread confinement is still required. The big changes introduced by iOS 5/OS X v10.7 were that contexts can now have other contexts as parents and can manage their own serial queues.

Changes are automatically migrated from children to parent upon a save. That's now what save means. Only if your parent is the persistent store are you actually committing to disk.

So all that stuff about synchronising by notifications is what Apple doesn't want you to follow. All of those mechanisms are still available but Apple has pulled the most common patterns directly into the framework.