SashaTsebrii

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    @IBOutlet weak var theTextfield: UITextField!
    
    let myPickerData = [String](arrayLiteral: "Peter", "Jane", "Paul", "Mary", "Kevin", "Lucy")

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

SashaTsebrii

// Default alert
let alert = UIAlertController(title: "Did you bring your towel?", message: "It's recommended you bring your towel before continuing.", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Yes", style: .default, handler: { action in
    print("Yay! You brought your towel!")
}))
alert.addAction(UIAlertAction(title: "No", style: .cancel, handler: nil))
self.present(alert, animated: true)

SashaTsebrii

class ViewController: UIViewController {
    
    // MARK: - Properties
    
    let titleLabel: UILabel = {
        let textLabel = UILabel()
        textLabel.text = "Monday"
        textLabel.font = UIFont.boldSystemFont(ofSize: 34)
        textLabel.textAlignment = .center
        return textLabel