Core Data

//------CoreData Fetch from AppDelegate-----//

-(NSManagedObjectContext *) managedObjectContext

{

    NSManagedObjectContext *context = nil;

    id delegate = [[UIApplication sharedApplication] delegate];

    if ([delegate performSelector:@selector(managedObjectContext)]) {

        context = [delegate managedObjectContext];

    }

    return context;

    

}

//--------Adding to CoreData Fields------//

NSManagedObjectContext *context = [self managedObjectContext];

        NSManagedObject *obj = [NSEntityDescription insertNewObjectForEntityForName:@"CashierDB" inManagedObjectContext:context];

        

        [obj setValue:[[[arr_order_details objectAtIndex:0] objectAtIndex:i] objectForKey:@"food_Id"] forKey:@"food_id"];

        

        NSError  *error1 = nil;

        NSError  *error  = nil;

        if(![context save:&error1])

        {

            NSLog(@"Can't Save! %@ %@", error, [error1 localizedDescription]);

        }

    }

//--------Fetching all fields from CoreData--------//

NSManagedObjectContext *context   =   [self managedObjectContext];

    NSFetchRequest  * fetchRequest      =   [[NSFetchRequest alloc]init];

    NSEntityDescription * entity        =   [NSEntityDescription entityForName:@"OrderDB" inManagedObjectContext:context];

    [fetchRequest setEntity:entity];

    NSError     * error;

    NSArray     * fetchedObjects        =   [context executeFetchRequest:fetchRequest error:&error];

    

    if([fetchedObjects count] == 0)

    {

        // NSLog(@" NULLLLLLLLLL");

    }

    else{

        for (NSManagedObject *info in fetchedObjects)

        {

            [nameArray          addObject:[info valueForKey:@"name"]];

            [countArray         addObject:[info valueForKey:@"count"]];

            [imageArray         addObject:[info valueForKey:@"image"]];

            [priceArray         addObject:[info valueForKey:@"price"]];

            [totalpriceArray    addObject:[info valueForKey:@"totalprice"]];

            [detailArray        addObject:[info valueForKey:@"detail"]];

        }

    }

//-----------Deleting All Fields from DB-----//

NSManagedObjectContext *context     = [self managedObjectContext];

    NSFetchRequest *fetchRequestDelete  = [[NSFetchRequest alloc] init];

    NSEntityDescription *entity         = [NSEntityDescription entityForName:@"OrderDB" inManagedObjectContext:context];

    [fetchRequestDelete setEntity:entity];

    NSError *error;

    NSArray *items = [context executeFetchRequest:fetchRequestDelete error:&error];

    for (NSManagedObject *managedObject in items)

    {

        [context deleteObject:managedObject];

    }

    if (![context save:&error])

    {

        NSLog(@"Error deleting  - error:%@",error);

    }

//-----------Deleting a single item from DB------//

BOOL del = NO;

    NSManagedObjectContext  * context    =   [self managedObjectContext];

    NSFetchRequest *fetchRequestDelete   = [[NSFetchRequest alloc] init];

    NSEntityDescription *detail          = [NSEntityDescription entityForName:@"OrderDB" inManagedObjectContext:context];

    [fetchRequestDelete setEntity:detail];

    NSError *error;

    NSArray *items   = [context executeFetchRequest:fetchRequestDelete error:&error];

    for (NSManagedObject *det in items)

    {

        if(del == NO)

        {

            for(int i =0; i<[items count];i++)

            {

                if([nameTodlt isEqualToString:[det valueForKey:@"name"]])

                {

                    [context deleteObject:det];

                    del =   YES;

                    break;

                }

            }

        }

        else

            break;

    }

    if (![context save:&error])

    {

        //NSLog(@"Error deleting  - error:%@",error);

    }

//---------cell for row for indexpath--------//

static NSString *cellID = @"MyCell";

        cell          = (DMF_categoryCell *)[categoryTable dequeueReusableCellWithIdentifier:cellID];

        if(cell==nil)

        {

            NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:@"DMF_categoryCell" owner:nil options:nil];

            for(id currentObject in nibObjects)

            {

                if([currentObject isKindOfClass: [DMF_categoryCell class]])

                {

                    cell                                =   (DMF_categoryCell *)currentObject;

                    UIImageView *selectedBackground     =   [[UIImageView alloc] initWithFrame:CGRectMake(0,0, 611,145)];

                    selectedBackground.backgroundColor  =   [UIColor darkGrayColor];

                    [cell setSelectedBackgroundView:selectedBackground];

                }

            }

        }