tableview-delegate-in-one-place.swift

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    switch data.count == 0 {
    case true:
        return 1
    case false:
        return data.count
    }
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    switch data.count == 0 {
    case true:
        /// No content
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "empty-cell-id", for: indexPath) as? EmptyTableViewCell
            else { return EmptyTableViewCell() }
        let noResultsView = NoResultsView()
        noResultsView.setContent()
        cell.setup(view: noResultsView)
        return cell
    case false:
        /// User cell
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "cell-id", for: indexPath) as? DataTableViewCell
            else { return DataTableViewCell() }
        cell.setContent(data: data[indexPath.row])
        return cell
    }
}