How to delete data in Mobile Services - iOS / iPhone (Windows Azure)

-(void)deleteItem:(NSDictionary *)item completion:(QSCompletionBlock)completion
{
    
    // delete the item in the TodoItem table and remove from the items array
    [self.table delete:item completion:^(NSNumber *itemId, NSError *error)
    {
        [self logErrorIfNotNil:error];
        
        // Let the caller know that we have finished
        completion();
    }];
}

        NSDictionary *item = [self.memberService.items objectAtIndex:indexPath.row];
        
        [self.memberService deleteItem:item completion:^
         {
             
             UIAlertView *av =
             [[UIAlertView alloc]
              initWithTitle:@"Delete Status"
              message:@"Delete Data Successfully"
              delegate:nil
              cancelButtonTitle:@"OK"
              otherButtonTitles:nil
              ];
             [av show];
        
        
             if(boolDelete)
             {
                 boolDelete = FALSE;
                 [myTable setEditing:NO animated:YES];
                 [itemEdit setTitle:@"Edit"];
             }
        
             [self refresh];
             
         }];