Mastering MVVM

ItemsViewController.swift

import UIKit

class ItemsViewController: UIViewController {
    @IBOutlet private weak var tableView: UITableView!
    private var viewModel: ItemsViewModel
    
    init(viewModel: ItemsViewModel) {
        self.viewModel = viewModel
        super.init(nibName: nil, bundle: nil)
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        viewModel.fetch { [weak self] in
            self?.tableView.reloadData()
        }
    }
}

extension ItemsViewController: UITableViewDataSource {
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return viewModel.items.count
    }
}