Main implementation of SimpleViewController

SimpleViewController.swift

public final class SimpleViewController: UIViewController {
    
    @IBOutlet weak var tableView: UITableView!
    
    // List of items, showed in TableView
    var peopleWithAdvertisementList: [SimpleViewCellItem]!
    
    public override func viewDidLoad() {
        setupTableView()
        createDummyList()
        tableView.reloadData()
    }
    
    fileprivate func setupTableView() {
        tableView.dataSource = self
        tableView.delegate = self
    }
    
    // Creates dummy list with 4 People and 2 Advertisements.
    // Both Types are comforming to SimpleViewCellItem protocol.
    fileprivate func createDummyList() {
        peopleWithAdvertisementList = [Person(name: "Dante", surname: "Brazeal"),
                                       Person(name: "Sharie", surname: "Bluitt"),
                                       Advertisement(brandName: "GoodRequest"),                                       
                                       Person(name: "Chauncey", surname: "Stephens"),
                                       Person(name: "Lacey", surname: "Fanske"),
                                       Advertisement(brandName: "GoodRequest")]
    }
    
}

extension SimpleViewController: UITableViewDataSource, UITableViewDelegate {
    
    public func numberOfSections(in tableView: UITableView) -> Int {
        return 1
    }
    
    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return peopleWithAdvertisementList.count
    }
    
    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        var dequeuedCell: UITableViewCell?
        
        if peopleWithAdvertisementList[indexPath.row] is Advertisement {
            dequeuedCell = tableView.dequeueReusableCell(withIdentifier: "AdvertisementCell")
        } else if peopleWithAdvertisementList[indexPath.row] is Person {
            dequeuedCell = tableView.dequeueReusableCell(withIdentifier: "PeopleCell")
        } else {
            // Else what? Do we have other type comforming to SimpleViewCellItem protocol?
        }
        
        return dequeuedCell ?? UITableViewCell()
    }
    
}