Change text of UILabel from outside of function - ios

Question

Once my UIButton is pressed, I want to change the text of my UILabels. Right now when the button is pressed it transitions to a new ViewController with the same background and same theme, just with different text. I figure it is not the best approach. I cannot access my UILables outside of my function setUpView(). What is the best approach to do this.
#objc func buttonTapped(_ sender: UIButton){
//this is where I will change my text. myLabel.text = "new text"
let modalViewController = PageTwoViewController()
modalViewController.modalPresentationStyle = .overCurrentContext
present(modalViewController, animated: false)
}
func setUpView(){
let headerView = UIView()
headerView.backgroundColor = UIColor.rgb(red: 235, green: 248, blue: 242)
view.addSubview(headerView)
headerView.anchor(top: view.topAnchor, left: view.leftAnchor, bottom: view.bottomAnchor, right: view.rightAnchor, paddingTop: 150, paddingLeft: 20, paddingBottom: 150, paddingRight: 20, width: 0, height: 0)
let myLabel = UILabel()
myLabel.text = "Rate your xxxxx"
myLabel.textColor = UIColor.rgb(red: 0, green: 48, blue: 51)
myLabel.textAlignment = .left
myLabel.numberOfLines = 0
headerView.addSubview(myLabel)
myLabel.font = .systemFont(ofSize: 32)
myLabel.anchor(top: headerView.topAnchor, left: headerView.leftAnchor, bottom: nil, right: headerView.rightAnchor, paddingTop: 150, paddingLeft: 30, paddingBottom: 0, paddingRight: 40, width: 0, height: 0)
let steps = UILabel()
steps.text = "1 of 3"
steps.textColor = UIColor.rgb(red: 0, green: 48, blue: 51)
headerView.addSubview(steps)
steps.font = .systemFont(ofSize: 14)
headerView.addSubview(steps)
steps.anchor(top: nil, left: headerView.leftAnchor, bottom: myLabel.topAnchor, right: nil, paddingTop: 0, paddingLeft: 30, paddingBottom: 10, paddingRight: 0, width: 0, height: 0)
let button = UIButton(type: .system)
button.setTitle("Next", for: .normal)
button.layer.cornerRadius = 30
button.backgroundColor = UIColor.white
button.setTitleColor(UIColor.rgb(red: 0, green: 48, blue: 51), for: .normal)
button.layer.borderWidth = 1.7
button.layer.borderColor = UIColor.black.cgColor
button.titleLabel?.font = UIFont.systemFont(ofSize: 20)
button.addTarget(self, action: #selector(buttonTapped), for: .touchUpInside)
headerView.addSubview(button)
button.anchor(top: nil, left: headerView.leftAnchor, bottom: headerView.bottomAnchor, right: headerView.rightAnchor, paddingTop: 0, paddingLeft: 25, paddingBottom: 30, paddingRight: 25, width: 0, height: 60)
}
override func viewDidLoad() {
setUpView()
super.viewDidLoad()
}

Answer 1

You have to declare the variables globally and then change the text.
class TestViewController: UIViewController {
private var myButton : UIButton = {
let button = UIButton()
button.backgroundColor = .red
return button
}()
private var myLabel: UILabel = {
let label = UILabel()
return label
}()
func setupView() {
myButton.setTitle("My Button", .normal) //You can do it like this
myLabel.text = "This is my text"
}
}

Answer 2

You can declare your labels globally in your view controller and then you can use any where in view controller as follow:
let myLabel: UILabel = {
let label = UILabel()
return label
}()