I asked the question in quote email two days ago with no response so let me try a related, but perhaps more concise/simpler question:
Is it even necessary to call -saveToURL:forSaveOperation:completionHandler in a UIManagedDocument subclass or will its autosaving mechanism take care of that at all times, including requesting extra time with a [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler: block when necessary. In other words, can I remove all calls to -saveToURL:forSaveOperation:completionHandler other than the one used to create a new file? I am not currently using iCloud. The symptom I'm seeing is about 1% of the people who have purchased my app are losing the data files (they seem to have zero size). I can't reproduce it and I've been using the app for 8 months while developing it without ever seeing this. I don't know if it's a save issue or if perhaps something such as a required entity attribute not getting set that is leading to the zero length file. I would be extremely grateful for any suggestions on how to track this down as I've temporarily pulled the app from the store until I can figure this out. Thanks, Dave On Aug 28, 2012, at 10:17 PM, [email protected] wrote: > > This is on iOS 5 and higher. > > I have an iOS app that can open separate data files (one open at a time) > using a UIManagedDocument subclass. > > When I do a -saveToURL:forSaveOperation:completionHandler > > do I need to that inside a: > > [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler: > > block in case the application enters the background and will be terminated > before the save operation completes? Or does UIManagedDocument take care of > that for me? > > Also, my app delegate's > > - (void)applicationDidEnterBackground:(UIApplication *)application > > do I need to call: > > - (void)closeWithCompletionHandler:(void (^)(BOOL success))completionHandler > > > and then reopen it in: > > - (void)applicationWillEnterForeground:(UIApplication *)application > > > Or can I just call: > > -saveToURL:forSaveOperation:completionHandler > > in > > - (void)applicationDidEnterBackground:(UIApplication *)application > > without worrying about closing the file if the app is later terminated? > > Thanks, > Dave > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/davelist%40mac.com > > This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
