Main Context Config

MainContextConfig.m

- (NSManagedObjectContext *)mainManagedObjectContext {
   
    NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
    if (coordinator != nil) {
        _mainManagedObjectContext = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
        [_mainManagedObjectContext setPersistentStoreCoordinator:coordinator];
    }
    return _mainManagedObjectContext;
}