Xcode 4 CoreData直观地设置数据
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我使用xcode 4并创建了CoreData模型。我想知道是否有可能将数据插入xcode中的实体。
请不要告诉我将数据输入模型的唯一方法是通过编程。
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- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions ... //test //writing data NSManagedObjectContext *context = [self managedObjectContext]; NSManagedObject *model = [NSEntityDescription insertNewObjectForEntityForName:@\"Invitados\" inManagedObjectContext:context]; [model setValue:@\"Alicia\" forKey:@\"name\"]; [model setValue:@\"Sanchez\" forKey:@\"firstname\"]; [model setValue:@\"Romero\" forKey:@\"secondname\"]; NSError *error; if (![context save:&error]) { NSLog(@\"Couldn\'t save: %@\", [error localizedDescription]); } //retrieving data // NSManagedObjectContext *context = [self managedObjectContext]; //NSError *error; NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@\"Invitados\" inManagedObjectContext:context]; [fetchRequest setEntity:entity]; NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error]; for (NSManagedObject *get in fetchedObjects) { NSLog(@\"Nombre: %@\", [get valueForKey:@\"name\"]); NSLog(@\"Apellido 1: %@\", [get valueForKey:@\"firstname\"]); NSLog(@\"Apellido 2: %@\",[get valueForKey:@\"secondname\"]); } // End test