I created a .xcdatamodel Managed Object Model file in Xcode. I selected that file in Groups & Files. Then I go to File > New... > and nowhere in the iPhone Templates / Cocoa Touch Class templates I see the "Managed Object Class" file template. Does anyone know what can be wrong? ...
1) I have the CoreData.framework imported. In Groups & Files I see it in the Framworks list together with UIKit.framework, Foundation.framework, CoreGraphics.framework. 2) I have this code, which should actually work. Don't know what that error means... #import <UIKit/UIKit.h> #import <CoreLocation/CoreLocation.h> @interface RootViewC...
I am writing a core data Cocoa application in which there are accounts and transactions (monetary). The account entity description contains a balance attribute. The transaction entity description has a relationship to an account. I need the application to update account balances when transactions have their accounts set or changed. For ...
Hi all, I'm trying to use core data in a multi thread way. I simply want to show the application with the previously downloaded data while downloading new data in background. This should let the user access the application during update process. I have a NSURLConnection which download the file asyncronously using delegate (and showing...
I am trying to generate predicate editor templates for my Core Data entities. In my code I have the following: NSEntityDescription *descrip = [NSEntityDescription entityForName:@"Person" inManagedObjectContext:managedObjectContext]; NSArray *templates = [NSPredicateEditorRowTemplate templatesWithAttributeKeyPaths:[NSArray arrayWithO...
Hi, I have a Core Data based iPhone application that needs to save 1000 managed objects on termination. This takes 8+ seconds, however, the OS kills the app if it does not complete in approx. 6 seconds. I don't want to save the objects earlier, because then the user has to wait 8 seconds longer for the results to display. Is it possib...
Hi there, I'm facing very annoying problem. My iPhone app is loading it's data from a network server. Data are sent as plist and when parsed, it neeeds to be stored to SQLite db using CoreData. Issue is that in some cases those datasets are too big (5000+ records) and import takes way too long. More on that, when iPhone tries to suspen...
I am saving arrays of doubles in an NSData* object that is persisted as a binary property in a Core Data (SQLite) data model. I am doing this to store sampled data for graphing in an iPhone app. Sometimes when there are more than 300 doubles in the binary object not all the doubles are getting saved to disk. When I quit and relaunch my a...
Hello guys, As far as I know, the Core Data store is stored in the application's documents directory. If the user updates the application through App Store, all the data will be removed, right? Can I save data to another place? Thanks ...
I have a Core Data model where I have an entity A, which is an abstract. Entities B, C, and D inherit from entity A. There are several properties defined in entity A which are used by B, C, and D. I would like to leverage this inheritance in my model code. In addition to properties, I am wondering if I can add methods to entity A, which...
I am trying to debug a very nefarious problem with some iPhone Core Data code. The setup is this: I have a thread which exists to poll a web service and send its results via NSNotification to the main thread (passed in the userDict, a bunch of strings and NSNumbers). I'm using Tim Hatcher's notification library to pass to the main threa...
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 b...
What's the secret to pulling up items that match characters typed into the search bar that react instantaneously? For instance, if I type in a letter "W" in the search bar, all phrases that contain a letter "W" in any character position within the phrase are returned immediately. So if a database of 20,000 phrases contains 500 phrases w...
I am trying to migrate my sandpit code into my main project but for some reason I am getting the following strange error when trying to compile syntax error before 'NSManagedObjectModel' At first I thought this was because coredata wasnt in the prefix.pch file but I have added it in there too. This is the top of AppDelegate where ...
So I am working on a simple iPhone app, that uses core data to manage objects. My code is similar in function to Apple's CoreDataBooks app, found here. There is a blank UITableViewCell, and you have the ability to add objects to this blank list. If you hit the add button, a DetailViewController pops up that manages the attribute of each ...
Hi there, I submitted an update of my application to the App Store which requires the Core Data model to be updated/migrated. It is only a simple change with a hand full of new attributes added, and one renamed. It seems to have gone fine for most users, however I've had 2 crash reports that I don't understand. The crashes appear to al...
In my project I have some objects that I show from a server, lets call them Foo's. When I get my Foo feed, I parse them into a NSMutableDictionary subclass called RemoteFoo, and pass these RemoteFoo objects all around the app to display data. If the user ends up wanting to download a RemoteFoo, I then create a core-data NSManagedObject...
I was under the impression that with key-value coding, I could set any undefined attribute on a NSManagedObject at runtime and no exception would be thrown, but it wouldbe a way to hold objects attached to the model that are not in the data model. For example, I have a Foo object that does not have a "bar" attribute. I though that at r...
I have added a section list for a simple Core Data iPhone app. I followed this so question to create it - How to use the first character as a section name but my list also contain items starting with characters outside A-Z, specially Å,Ä and Ö used here in Sweden. The problem now is that when the table view shows the section list the ...
I'm currently trying to sort my array of objects into day order so they can be grouped in the correct order i.e. Monday, Tuesday, Wednesday then by start time. Only problem is I can't figure out how to do this, my code currently looks like this: Which sorts alphabetically then by time: NSString *sectionKey = nil; switch (tab) { case k...