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import UIKit

class ViewController: UIViewController {
    
    // MARK: - IBOutlets
    @IBOutlet weak var tableView: UITableView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

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import UIKit

protocol SecondViewControllerProtocol {
    func didDoSomethingOnSecondViewController(message: String)
}

class SecondViewController: UIViewController {

    //MARK: - Variables
    var delegate: SecondViewControllerProtocol?

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import UIKit

class FirstViewController: UIViewController, SecondViewControllerProtocol {

    // MARK: - Navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "FirstToSecondSegue" {
            if let vc = segue.destination as? SecondViewControllerProtocol {
                vc.delegate = self
            }

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func selectedTheAnimal(animal: Animal) {
    let alert = UIAlertController(title: animal.name.uppercased(), message: "Selected the: \(animal.name)", preferredStyle: .alert)
    let action = UIAlertAction(title: "OK", style: .cancel, handler: nil);
    alert.addAction(action)
    self.present(alert, animated: true, completion: nil)
}

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// MARK: - Keyboard
@IBAction func hideKeyboard(_ sender: Any) {
    self.view.endEditing(true)
}

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 self.navigationItem.setRightBarButton(UIBarButtonItem(barButtonSystemItem: .save, target: self, action: #selector(saveProfile)), animated: true)

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import UIKit

@IBDesignable

class CustomView: UIView {
    
    // MARK: - IBOutlets
    @IBOutlet weak var centerImageView: UIImageView!
    
    // MARK: - Init Methods

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// MARK: - Table View

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    tableView.deselectRow(at: indexPath, animated: true)

    let animal = self.animalsArray[indexPath.row]

    //programaticamente
    let storyboard = UIStoryboard(name: "Home", bundle: nil)
    if let vc = storyboard.instantiateViewController(withIdentifier: "DetailViewControllerID") as? DetailViewController {

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// MARK: - Navigation

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "HomeToDetailSegue" {
        if let vc = segue.destination as? DetailViewController {
            vc.delegate = self
            if let animal = sender as? Animal {
                vc.selectedAnimal = animal
            }
        }

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override func viewDidLoad() {
  super.viewDidLoad()

  //TableView
  self.tableView.delegate = self
  self.tableView.dataSource = self
  self.tableView.register(UITableViewCell.classForCoder(), forCellReuseIdentifier: "cell")
  self.tableView.register(HomeTableViewCell.classForCoder(), forCellReuseIdentifier: homeCellIndentifier)
  self.tableView.register(UINib(nibName:"HomeTableViewCell", bundle: nil), forCellReuseIdentifier: homeCellIndentifier)
}