Styjun

I have simple tableview. . When I want to delete cell from table view, I get that error.

View controller code:

class FoodCategoryDetailTableViewController: UITableViewController {
 var foodCategoryDetailViewModel: FoodCategoryDetailTableViewViewModelType?

 private let disposeBag = DisposeBag()

 override func viewDidLoad() 
 super.viewDidLoad()

 guard let foodCategoryDetailViewModel = foodCategoryDetailViewModel else return 

 tableView.delegate = nil
 tableView.dataSource = nil

 foodCategoryDetailViewModel.foodsInSelectedCategory
 .bind(to: tableView.rx.items(cellIdentifier: FoodCategoryDetailTableViewCell.cellIdentifier, cellType: FoodCategoryDetailTableViewCell.self))
 row, food, cell in
 cell.foodCategoryDetailCellViewModel = foodCategoryDetailViewModel.cellViewModel(forRow: row)
 .disposed(by: disposeBag)

 tableView.rx.itemDeleted.subscribe( [unowned self] indexPath in
 self.foodCategoryDetailViewModel?.removeFoodFromApplication(atRow: (indexPath.element?.row)!)
 self.tableView.reloadData()
 ).disposed(by: disposeBag)
 

View Model code:

class FoodCategoryDetailTableViewViewModel: FoodCategoryDetailTableViewViewModelType 
 var foodsInSelectedCategory: BehaviorRelay<[Food]>
 private var foodCategoryId: Int16

 func cellViewModel(forRow row: Int) -> FoodTableViewCellViewModelType? 
 if let food = getFood(atRow: row) 
 return FoodTableViewCellViewModel(foodModel: food)
 
 return nil
 

 func removeFoodFromApplication(atRow row: Int) 
 if let food = getFood(atRow: row) 
 var foods = foodsInSelectedCategory.value
 foods.remove(at: row)
 self.foodsInSelectedCategory = BehaviorRelay(value: foods)
 CoreDataHelper.sharedInstance.removeFoodFromApplication(foodName: food.name!)
 
 

 private func getFood(atRow row: Int) -> Food? 
 let food = foodsInSelectedCategory.value[row]

 return food
 

 init(foodCategoryId: Int16) 
 self.foodCategoryId = foodCategoryId
 self.foodsInSelectedCategory = BehaviorRelay(value: CoreDataHelper.sharedInstance.fetchFoodsFromSelectedCategory(foodCategoryId: self.foodCategoryId))
 

I am using Core Data. I get error in function getFood(). It error exist because row in view controller have old count of items in tableview. It is not updating with new count of items (foods) after delete cell.