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PONSFetchedResultsController not showing updates from other contexts
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2010-01-28T14:24:08.083
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2010-01-29T05:19:46.690
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2010-01-29T04:19:22.687
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Body
I have an NSFetchedResultsController set up to populate a UITableView, based off my 'main' NSManagedObjectContext. In a timer, I continually add objects into a separate NSManagedObjectContext, but one that shares its NSPersistantStoreCoordinator with the main context. I can see NSManagedObjectContextWillSaveNotification notifications being sent, and when I quit an restart the app, I have all the data from the previous run. However, no updates happen to the current NSFetchedResultsController. I've created a test project and placed it <a href="http://dl.dropbox.com/u/85235/MultiContext%20Core%20Data.zip" rel="nofollow noreferrer">here</a>. (I initially thought this was happening due to there being multiple threads at play; however, it happens when everything is done in one thread). Original Question I have an NSFetchedResultsController set up to populate a UITableView, based off my 'main' NSManagedObjetContext. In a background thread, I download and import several objects into a separate NSManagedObjectContext, but one that shares its NSPersistantStoreCoordinator with the main thread's context. I am registered to receive NSManagedObjectContextWillSaveNotification notifications. When I get these, I forward them on to the main thread, and pass them to my main context. Using the debugger, I can watch these come in, and verify that they are, indeed, adding objects to the context. However, my NSFetchedResultsController is not updating. If I do this all in the main thread, it does work. Calling -performFetch: on the controller will cause it to update, so I know it's not that it's not seeing the new objects. Most of this is boilerplate code, just split into different threads.
Tags
<iphone><core-data><nsfetchedresultscontroller>
Title
NSFetchedResultsController not showing updates from other contexts
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