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PONever getting iCloud change notifications
 

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  1. PONever getting iCloud change notifications
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    <p>I am working on Core Data syncing over iCloud between two Mac applications. I have it mostly working (based on <a href="http://timroadley.com/2012/04/03/core-data-in-icloud/" rel="nofollow noreferrer">http://timroadley.com/2012/04/03/core-data-in-icloud/</a>) - data is being synced, but I'm never getting the content change notification I need to merge the changes into my local context.</p> <p>In my AppDelegate's managedObjectContext method:</p> <pre><code>NSManagedObjectContext * moc = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType]; [moc performBlockAndWait: ^{ [moc setPersistentStoreCoordinator:coordinator]; [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mergeChangesFrom_iCloud:) name:NSPersistentStoreDidImportUbiquitousContentChangesNotification object:coordinator]; }]; </code></pre> <p>My observer function never gets called:</p> <pre><code>- (void) mergeChangesFrom_iCloud:(NSNotification*) notification { NSLog(@"Merging changes from iCloud"); // everything past here is irrelevent - this log message never appears </code></pre> <p>The data store is most certainly being synced - deleting a record in app A and forcing a table reload in app B results in a Core Data fault failure as expected for unmerged changes. Quitting and restarting app B shows the correctly updated data.</p> <p>A breakpoint on the addObserver call shows it is being called. A breakpoint in <code>mergeChangesFrom_iCloud</code> shows that it is not.</p> <p>Why is the coordinator apparently never sending the <code>NSPersistentStoreDidImportUbiquitousContentChangesNotification</code> as the documentation (and tutorials) claim it should? Where can I begin debugging this?</p> <p><strong>Update</strong></p> <p>The mystery deepens. Using the Core Foundation function shown here - <a href="https://stackoverflow.com/questions/3725234/nsnotificationcenter-trapping-and-tracing-all-nsnotifications">NSNotificationCenter trapping and tracing all NSNotifications</a> - I do not see <code>NSPersistentStoreDidImportUbiquitousContentChangesNotification</code> appear at all among the mass of notifications flying by.</p> <p>It looks like it's not being posted at all - nor do I see any other Core Data related notifications after the initial load happens on startup.</p>
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    1. USXtapolapocetl
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    1. CODid you find a sollution? I think I have a similar issue that devices not update without a forced quit and restart. I think this happens when the App is in background when a notification comes (in my case) but doesn't check for updates when opened again when loaded.
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      1. PONever getting iCloud change notifications
      1. USLuuk D. Jansen
    2. CONo, I never found a solution to this - I believe iCloud syncing just doesn't work properly between two Mac applications on the same machine. Hopefully it will be fixed in the future.
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      1. PONever getting iCloud change notifications
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    3. COdo you see that your ubiquitous store is updated at all? does it differ between the two apps? (the URL I mean).
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      1. PONever getting iCloud change notifications
      1. USMagnus
 

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