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임은 핵심 데이터 개체에 값을 삽입하려고하지만 관계 필드에 삽입 할 때 나는 그것을 해결삽입 값은
NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName: [entity name] inManagedObjectContext:context];
[newManagedObject setValue:[NSDate date] forKey:@"fechaAprovacion"];
[newManagedObject setValue:[NSDate date] forKey:@"fechaUltimoOficio"];
//relationship field----->[newManagedObject setValue:[NSNumber numberWithInteger:self.index.row] forKey:@"vObra"]; //<---relationship field
// Save the context.
NSError *error = nil;
if (![context save:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
abort();
}