Re: Weird Core Data crash
Re: Weird Core Data crash
- Subject: Re: Weird Core Data crash
- From: Kyle Sluder <email@hidden>
- Date: Wed, 30 Nov 2011 07:58:30 -0800
And of course I linked to out-of-date documentation.
Here's a document that actually talks about the new concurrency
support: http://developer.apple.com/library/mac/#releasenotes/DataManagement/RN-CoreData/_index.html
--Kyle Sluder
On Wed, Nov 30, 2011 at 7:56 AM, Kyle Sluder <email@hidden> wrote:
> If you're targeting 10.7, you can use the new NSManagedObjectContext
> concurrency support:
>
> http://developer.apple.com/library/ios/#documentation/cocoa/conceptual/coredata/Articles/cdConcurrency.html#//apple_ref/doc/uid/TP40003385-SW1
>
> --Kyle Sluder
>
> On Wed, Nov 30, 2011 at 7:41 AM, Andrew Kinnie <email@hidden> wrote:
>> 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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