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2014/10/15 ¤U¤È 10:11:30

iphone Programming Glossary: mom

Core Data Migration Across Multiple Version Upgrades

http://stackoverflow.com/questions/1557344/core-data-migration-across-multiple-version-upgrades

I have an iPhone app that uses Core Data. I did an update and used Lightweight Migration to go from V1 to V2 of my MOM Managed Object Model . This worked perfectly. What happens when I want to go to V3 and beyond of my MOM If I decide to continue.. V1 to V2 of my MOM Managed Object Model . This worked perfectly. What happens when I want to go to V3 and beyond of my MOM If I decide to continue with Lightweight Migration will it automatically deal with migrating from V1 to V3 and V2 to V3.. to continue with Lightweight Migration will it automatically deal with migrating from V1 to V3 and V2 to V3 of my MOM or do I need to do something extra If I decide to use a mapping model what happens How do I deal with upgrading both V1..

New to Core Data for iphone

http://stackoverflow.com/questions/1656476/new-to-core-data-for-iphone

app so you'll need to... Add three main Core Data objects the managed object context MOC the managed object model MOM and the persistent store coordinator PSC . These need to be accessible wherever you want Core Data available so either in.. so either in your app delegate or more preferably in the controller or data source for your table view. Create a MOM in Xcode. This will be a file of type .xcdatamodel and it's an object graph that defines all the Core Data entities you..

insertNewObjectForEntityForName:

http://stackoverflow.com/questions/1780929/insertnewobjectforentityforname

you didn't set up the MOC is almost certainly the problem. Most specifically it means you're probably not loading your MOM Managed Object Model that defines Person. Somewhere in your code you should have something like this managedObjectModel..

Removing and adding persistent stores to a core data application

http://stackoverflow.com/questions/2257557/removing-and-adding-persistent-stores-to-a-core-data-application

the need to build up and tear down multiple Core Data stacks. Update 2 A new stack is the entire stack. The PSC the MOM and the MOC. You are pulling the rug out from under the Core Data stack and then expecting it to just figure out what you.. Late Update Um so what would be an acceptable scenario for creating only the PS and MOC and using existing PSC and MOM If I guessed I'd say that every time I made modifications to the existing stack it should be created anew and that if multiple..

Cannot create an NSPersistentStoreCoordinator with a nil model after deleting app from device

http://stackoverflow.com/questions/12617585/cannot-create-an-nspersistentstorecoordinator-with-a-nil-model-after-deleting-ap

nil return __managedObjectModel NSURL modelURL NSBundle mainBundle URLForResource @ Name withExtension @ momd if NSFileManager defaultManager fileExistsAtPath modelURL path NSLog @ @ modelURL path This is printed because file exists.. mergedModelFromBundles nil Cleaned Build Folder and Cleaned project Restarted Xcode Restarted computer Changed momd to mom .xcdatamodeld is in Copy Bundle Resources and Compile Sources Renamed .xcdatamodeld and cleaned and closed Xcode.. mergedModelFromBundles nil Cleaned Build Folder and Cleaned project Restarted Xcode Restarted computer Changed momd to mom .xcdatamodeld is in Copy Bundle Resources and Compile Sources Renamed .xcdatamodeld and cleaned and closed Xcode project..

core data in a static library for the iPhone

http://stackoverflow.com/questions/1711586/core-data-in-a-static-library-for-the-iphone

relies on the static library you have to include that bundle as well. Your main project will now have access to the mom file that is needed to use core data. To use core data with the mom from the bundle you have to create a merged managed.. Your main project will now have access to the mom file that is needed to use core data. To use core data with the mom from the bundle you have to create a merged managed object model in your code it might be the main project has some core..

Can't find momd file: Core Data problems

http://stackoverflow.com/questions/4536414/cant-find-momd-file-core-data-problems

find momd file Core Data problems Aw geez I screwed something up I'm a Core Data noob working on my first iOS app. After much Stack.. After much Stack Overflowing I'm using this code NSString path NSBundle mainBundle pathForResource @ CoreData ofType @ momd if path path NSBundle mainBundle pathForResource @ CoreData ofType @ mom NSAssert path nil @ Unable to find Resource in.. pathForResource @ CoreData ofType @ momd if path path NSBundle mainBundle pathForResource @ CoreData ofType @ mom NSAssert path nil @ Unable to find Resource in main bundle CoreData is the name of my app. I've tried to put in initial..

core data application is Crashing in iphone device

http://stackoverflow.com/questions/6706505/core-data-application-is-crashing-in-iphone-device

nil return managedObjectModel NSURL modelURL NSBundle mainBundle URLForResource @ TouristGuide withExtension @ momd managedObjectModel NSManagedObjectModel alloc initWithContentsOfURL modelURL NSLog @ @ modelURL return managedObjectModel.. got stuck change your code from this NSURL modelURL NSBundle mainBundle URLForResource @ TouristGuide withExtension @ momd to this NSURL modelURL NSBundle mainBundle URLForResource @ TouristGuide withExtension @ mom ...change momd to mom . Then.. withExtension @ momd to this NSURL modelURL NSBundle mainBundle URLForResource @ TouristGuide withExtension @ mom ...change momd to mom . Then delete the app from device or simulator Clean build folder clean and rebuild and re run the..