UITableView

import UIKit

struct Song {
    let title: String
    let frequency: Float
}

import UIKit

class EditViewController: UIViewController {
    
    // Model-Objekte
    var frequency: Double? // will receive actual frequency from MetronomeViewController
    //var songs = [Song]()
    var songs: [Song] = [
        Song(title: "Arm aber reich", frequency: 124),
        Song(title: "Rebell", frequency: 82.5),
        Song(title: "Herz hat recht", frequency: 98)
    ]
    
    @IBOutlet weak var tableView: UITableView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        tableView.dataSource = self // catch datasource delegate
        tableView.delegate = self // catch view delegate
    }
}

 /**
 Implement UITableViewDataSource Protocol which is responsible for telling tableview how many cells needed and how to fill them
 */
extension EditViewController: UITableViewDataSource{
    // How many rows we need?
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return songs.count
    }
     // Called for every dataitem -> let's create a cell
    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "SongCell", for: indexPath)
        let strSongNumber = String(format:"%d / %d",(indexPath.row + 1), (indexPath.count + 1) )
        cell.textLabel?.text = "\(strSongNumber) \(songs[indexPath.row].title)"
        let strFrequency = String(format:"%.1f bpm",songs[indexPath.row].frequency)
        cell.detailTextLabel?.text = strFrequency
        return cell
    }
}

 /**
 Implement UITableViewDelegate
 Methods for managing selections, configuring section headers and footers, deleting and reordering cells, and performing other actions in a  table view.
 */
extension EditViewController: UITableViewDelegate{
    func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        print("row: \(indexPath.row) ")
    }
}