I am opening ViewController when the local notification pops up and user clicks on it.

appDelegate.m
- (void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification {

    ViewController *test = [[ViewController alloc]initWithNibName:@"ViewController" bundle:nil];
    test.managedObjectContext = self.managedObjectContext;
    [_navigationController presentModalViewController:test animated:YES];
}

Viewcontroller.h

@interface ViewController : UIViewController
{
  Folder *folder;
  NSManagedObjectContext *managedObjectContext;
}
@property (nonatomic, strong) Folder *folder;
@property (nonatomic, strong) NSManagedObjectContext *managedObjectContext;

ViewController.m

- (void)ViewDidLoad
{
     NSMutableArray *m_notes = [self.folder.task mutableCopy];
         NSLog(@"%i",[m_notes count]);

    this shows zero
}