class ViewController: UIViewController {

private var arrayOfMethods = [String]()

@IBOutlet var greenLabel: UILabel!
@IBOutlet var blueLabel: UILabel!
@IBOutlet var yellowLabel: UILabel!

override func viewDidLoad() {
    super.viewDidLoad()
    printMessage()
}

override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    printMessage()
}

override func viewDidAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    printMessage()
}

override func viewWillDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    printMessage()
}

override func viewDidDisappear(_ animated: Bool) {
    super.viewWillDisappear(animated)
    printMessage()
}

func printMessage(line: Int = #line, function: String = #function) {
    print("(title ?? "nil"). Line: (line) of function (function)")
    arrayOfMethods.append(function)
    let string = arrayOfMethods.joined(separator: "n")
    greenLabel.text = "(title ?? "nil") (string)"
}