class TableViewReloadTestViewController: UIViewController {

    private lazy var tableView: UITableView = UITableView()

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.frame = view.frame
        view.addSubview(tableView)
        tableView.dataSource = self
        tableView.delegate = self
    }

}

extension TableViewReloadTestViewController: UITableViewDataSource, UITableViewDelegate {

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        100
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

        print("cellForItemAt \(indexPath)")

        let cell = UITableViewCell(style: .default, reuseIdentifier: nil)

        cell.textLabel?.text = "Row \(indexPath.row)"

        let redView = UIView()
        cell.contentView.addSubview(redView)
        redView.backgroundColor = .red.withAlphaComponent(0.1)
        redView.translatesAutoresizingMaskIntoConstraints = false
        cell.contentView.addConstraints([
            .init(item: redView, attribute: .left, relatedBy: .equal, toItem: cell.contentView, attribute: .left, multiplier: 1.0, constant: 8.0),
            .init(item: redView, attribute: .right, relatedBy: .equal, toItem: cell.contentView, attribute: .right, multiplier: 1.0, constant: -8.0),
            .init(item: redView, attribute: .top, relatedBy: .equal, toItem: cell.contentView, attribute: .top, multiplier: 1.0, constant: 8.0),
            .init(item: redView, attribute: .bottom, relatedBy: .equal, toItem: cell.contentView, attribute: .bottom, multiplier: 1.0, constant: -8.0)
        ])
        let heightConstraint = NSLayoutConstraint(item: redView, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 100.0)
        heightConstraint.priority = .defaultLow
        redView.addConstraint(heightConstraint)

        return cell
    }

    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

        //let randomRow = (0..<tableView.numberOfRows(inSection: indexPath.section)).randomElement()!

        // let's reload the selected row (Visible row)
        let randomRow: Int = indexPath.row

        tableView.reloadRows(at: [IndexPath(row: randomRow, section: indexPath.section)], with: .automatic)

        print("Reloading at \(randomRow)")
    }

    func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
        // log the calls
        print("estimatedHeightForRowAt ", indexPath)
        return 10
    }

}