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2014/10/15 ¤U¤È 10:11:30
iphone Programming Glossary: mocJSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone managedObjectsFromJSONStructure NSString json withManagedObjectContext NSManagedObjectContext moc And the implementation is as follows NSDictionary dataStructureFromManagedObject NSManagedObject managedObject.. NSDictionary structureDictionary withManagedObjectContext NSManagedObjectContext moc NSString objectName structureDictionary objectForKey @ ManagedObjectName NSManagedObject managedObject.. NSEntityDescription insertNewObjectForEntityForName objectName inManagedObjectContext moc managedObject setValuesForKeysWithDictionary structureDictionary for NSString relationshipName in managedObject..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone jsonStructureFromManagedObjects NSArray managedObjects NSArray managedObjectsFromJSONStructure NSString json withManagedObjectContext NSManagedObjectContext moc And the implementation is as follows NSDictionary dataStructureFromManagedObject NSManagedObject managedObject NSDictionary attributesByName managedObject entity.. objectsArray return jsonString NSManagedObject managedObjectFromStructure NSDictionary structureDictionary withManagedObjectContext NSManagedObjectContext moc NSString objectName structureDictionary objectForKey @ ManagedObjectName NSManagedObject managedObject NSEntityDescription insertNewObjectForEntityForName objectName.. objectForKey @ ManagedObjectName NSManagedObject managedObject NSEntityDescription insertNewObjectForEntityForName objectName inManagedObjectContext moc managedObject setValuesForKeysWithDictionary structureDictionary for NSString relationshipName in managedObject entity relationshipsByName allKeys NSRelationshipDescription..
Core Data could not fullfil fault for object after obtainPermanantIDs http://stackoverflow.com/questions/11321717/core-data-could-not-fullfil-fault-for-object-after-obtainpermanantids be able to ask for permanent IDs though but you should only ask for them on the objects that have been inserted. moc obtainPermanentIDsForObjects moc.insertedObjects.allObjects error 0 You must do this before saving the MOC though because.. IDs though but you should only ask for them on the objects that have been inserted. moc obtainPermanentIDsForObjects moc.insertedObjects.allObjects error 0 You must do this before saving the MOC though because if you save without obtaining permanent..
JSON and Core Data on the iPhone http://stackoverflow.com/questions/2362323/json-and-core-data-on-the-iphone managedObjects NSArray managedObjectsFromJSONStructure NSString json withManagedObjectContext NSManagedObjectContext moc And the implementation is as follows NSDictionary dataStructureFromManagedObject NSManagedObject managedObject NSDictionary.. managedObjectFromStructure NSDictionary structureDictionary withManagedObjectContext NSManagedObjectContext moc NSString objectName structureDictionary objectForKey @ ManagedObjectName NSManagedObject managedObject NSEntityDescription.. NSManagedObject managedObject NSEntityDescription insertNewObjectForEntityForName objectName inManagedObjectContext moc managedObject setValuesForKeysWithDictionary structureDictionary for NSString relationshipName in managedObject entity relationshipsByName..
Crash when adding persistent store (iCloud enabled) in app delegate http://stackoverflow.com/questions/8021753/crash-when-adding-persistent-store-icloud-enabled-in-app-delegate _notificationArray void mergeChangesFrom_iCloud NSNotification notification if self.unlocked NSManagedObjectContext moc self managedObjectContext if self.notificationArray.count 0 for NSNotification note in _notificationArray moc performBlock.. moc self managedObjectContext if self.notificationArray.count 0 for NSNotification note in _notificationArray moc performBlock ^ self mergeiCloudChanges note forContext moc _notificationArray removeAllObjects moc performBlock ^ .. 0 for NSNotification note in _notificationArray moc performBlock ^ self mergeiCloudChanges note forContext moc _notificationArray removeAllObjects moc performBlock ^ self mergeiCloudChanges notification forContext moc else moc..
Core Data could not fullfil fault for object after obtainPermanantIDs http://stackoverflow.com/questions/11321717/core-data-could-not-fullfil-fault-for-object-after-obtainpermanantids I'm getting data from a webserver processing it on a child private background context called backgroundMOC . It is a child of a mainMOC which is linked to the main UI so saving on the backgroundMOC triggers UI changes. The mainMOC.. from a webserver processing it on a child private background context called backgroundMOC . It is a child of a mainMOC which is linked to the main UI so saving on the backgroundMOC triggers UI changes. The mainMOC is a child of a masterMOC.. context called backgroundMOC . It is a child of a mainMOC which is linked to the main UI so saving on the backgroundMOC triggers UI changes. The mainMOC is a child of a masterMOC which is a private background queue tied to the persistent store..
insertNewObjectForEntityForName: http://stackoverflow.com/questions/1780929/insertnewobjectforentityforname to do that either. objective c iphone core data share improve this question The fact that 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..
Is there a way to instantiate a NSManagedObject without inserting it? http://stackoverflow.com/questions/3868514/is-there-a-way-to-instantiate-a-nsmanagedobject-without-inserting-it nsmanagedobject share improve this question There's a fundamental problem with using a nil MOC Objects in different MOCs aren't supposed to reference each other &mdash this presumably also applies when one side of a.. share improve this question There's a fundamental problem with using a nil MOC Objects in different MOCs aren't supposed to reference each other &mdash this presumably also applies when one side of a relationship has a nil MOC... aren't supposed to reference each other &mdash this presumably also applies when one side of a relationship has a nil MOC. What happens if you save What happens when another part of your app saves If your object doesn't have relationships then..
Can't find momd file: Core Data problems http://stackoverflow.com/questions/4536414/cant-find-momd-file-core-data-problems nil It takes care of getting the path choosing merging the correct mom or momd and initializing of the MOC all by one step. You should use this. But note that you need to clean the build process once in a while as discussed in..
Crash when adding persistent store (iCloud enabled) in app delegate http://stackoverflow.com/questions/8021753/crash-when-adding-persistent-store-icloud-enabled-in-app-delegate myMainView.managedObjectContext self managedObjectContext the example above will rebuild the MOC and PSC for you with the new parameters in mind Then there is the mergeiCloudChanges forContext method void mergeiCloudChanges..
Core Data's NSPrivateQueueConcurrencyType and sharing objects between threads http://stackoverflow.com/questions/8637921/core-datas-nsprivatequeueconcurrencytype-and-sharing-objects-between-threads objects between threads iOS 5 introduced a new way to quickly fetch data on a background thread by initializing the MOC using NSPrivateQueueConcurrencyType and then doing the fetch in performBlock One of the rules of thumb of Core Data has.. Assume we have these two context They need to be set up. Assume they are. NSManagedObjectContext mainMOC NSManagedObjectContext alloc initWithConcurrencyType NSMainQueueConcurrencyType autorelease NSManagedObjectContext backgroundMOC.. alloc initWithConcurrencyType NSMainQueueConcurrencyType autorelease NSManagedObjectContext backgroundMOC NSManagedObjectContext alloc initWithConcurrencyType NSPrivateQueueConcurrencyType autorelease Now this can safely be called..
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