Generic Tableview

GenericTableview.swift

//
//  ViewController.swift
//  ReusableTableView
//
//  Created by Damodar Namala on 23/04/23.
//

import UIKit

class ViewController: UIViewController {
    let viewController = PersonTableViewController()

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }


    @IBAction func next() {
        
        viewController.load(items: [Person(name: "Damoda", age: 36)]) { person, cell in
            cell.textLabel?.text = person.name
        }
        
        viewController.didSelectRowAt = { item in
            print(item.name)
        }
        self.navigationController?.pushViewController(viewController, animated: true)
    }
}

class GenericTableViewController<T, Cell: UITableViewCell>: UITableViewController {
    var items: [T] = []
    var configureCell: (T, Cell) -> Void
    var didSelectRowAt: ((T) -> Void)?
      
    init(items: [T] = [], configureCell: @escaping (T, Cell) -> Void) {
        self.items = items
        self.configureCell = configureCell
        super.init(style: .plain)
        self.tableView.register(Cell.self, forCellReuseIdentifier: "Cell")
    }
      
    func load(items: [T], configureCell: @escaping (T, Cell) -> Void) {
        self.items = items
        self.configureCell = configureCell
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("\(#function) has not been implemented")
    }
    
    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return items.count
    }
      
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! Cell
        let item = items[indexPath.row]
        configureCell(item, cell)
        return cell
    }
      
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let item = items[indexPath.row]
        didSelectRowAt?(item)
    }
}

struct Person {
    let name: String
    let age: Int
}
  
class PersonCell: UITableViewCell {
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        // Configure the cell here
    }
      
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}

  
class PersonTableViewController: GenericTableViewController<Person, PersonCell> {
    init() {
        super.init() { person, cell in
            cell.textLabel?.text = person.name
            cell.detailTextLabel?.text = "\(person.age)"
        }
    }
    
    func load(persons: [Person], configureCell: @escaping (Person, PersonCell) -> Void) {
        self.items = items
        self.configureCell = configureCell
    }
      
    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("\(#function) has not been implemented")
    }
}