How do I use CoreData with NSFileCoordinator? Does one of the frame-work provided classes in the CoreData stack implement the NSFilePresenter protocol, or do I have to build a wrapper that adds/removes persistent stores every time I need to relinquish / p

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Created Jul ’18

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I'd like to have a CoreData store in a shared app group container between my app and an extension. Since iOS 8.2, file coordination supports that file setup, but I don't see the classes in the CoreData stack which conform to the NSFilePresenter protocols, nor own an NSFileCoordinator.

While most of the time I expect the app to be dormant while the extension is running, there will be brief moments of important cross link where a user starts in the extension, but has to pull up the app to continue.

Or maybe do the coredata stores handle syncing in some other way already?

Answered by benspratling4 in 389712022

A standard CoreData stack uses file access arbitration from the underlying (my?)SQL(lite?) implementation. It's not FilePresenters, but it does permit two processes to access the same-on-disk store without error.

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KMT OP

Jul ’18

Ben:

Pls. try to avoid using the title as your question, thanks...

See For Best Results - Read the Label

Ken

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Answer 2

benspratling4 OP

Oct ’19

Accepted Answer

A standard CoreData stack uses file access arbitration from the underlying (my?)SQL(lite?) implementation. It's not FilePresenters, but it does permit two processes to access the same-on-disk store without error.

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