Re: Weird Core Data crash
Re: Weird Core Data crash
- Subject: Re: Weird Core Data crash
- From: Andrew Kinnie <email@hidden>
- Date: Wed, 30 Nov 2011 10:41:56 -0500
OK. Thanks. (I'd have responded sooner but I was driving all day)
I will look into this. It does appear that I was not being precise enough with the MOC on potential multiple threads. So we should probably have a moc on the main thread (for queries, etc) and have transient background thread based mocs for the fairly heavy lifting.
Thanks again.
Andrew
On Nov 29, 2011, at 8:51 AM, Fritz Anderson wrote:
> On 29 Nov 2011, at 7:21 AM, Andrew Kinnie wrote:
>
>> This method may be called from the main thread or from a background thread, but is always called using performSelectorInBackground.
>
> It's not enough that you divert the call to _a_ background thread. You must send it to _the_ background thread that owns the managed-object context.
>
> If necessary (you can't exchange the data between threads through non-CD immutable types), each thread that does business with your persistent store should have its own MOC, coordinate its content with NSManagedObjectContextDidSaveNotification, and query/update the store only through its MOC.
>
> — F
>
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