diffable_tableview.swift

import UIKit

struct Superhero: Hashable {
    let name: String
}

class ViewController: UIViewController {

    @IBOutlet weak var tableView: UITableView!
    var dataSource: UITableViewDiffableDataSource<Int, Superhero>!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 1. Connect a diffable data source to your table view.
        dataSource = UITableViewDiffableDataSource(tableView: tableView, cellProvider: { (tableView: UITableView, indexPath: IndexPath, item: Superhero) -> UITableViewCell? in
            // 2. Implement a cell provider to configure your table view’s cells.
            let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
            cell.textLabel?.text = item.name
            return cell
        })
        
        // 3. Generate the current state of the data.
        var snapshot = dataSource.snapshot()
        snapshot.appendSections([0])
        snapshot.appendItems([Superhero(name: "스파이더맨"),
                              Superhero(name: "아이언맨")], toSection: 0)
        
        // 4. Display the data in the UI.
        dataSource.apply(snapshot, animatingDifferences: false)
    }
}