How can I make variables inside an IBAction public to all view controllers? - swift

Question

So I'm trying to make a Chess Time app, where both players have access to a clock and they change the time between bullet(3minutes), Blitz(5minutes), and Rapid(10Minutes). Well in my second view controller SettingsController I made 3 IBActions UIButtons for this.
#IBAction func bulletPressed(_ sender: UIButton) {
var storedTime = bullet
self.delegate?.storedTimeTimer()
self.navigationController?.popViewController(animated: true)
}
#IBAction func blitzPressed(_ sender: UIButton) {
var storedTime = blitz
}
#IBAction func rapidPressed(_ sender: UIButton) {
var storedTime = rapid
}
This is my SettingsController, my whole point is trying to get the storedTime into the first controller. I tried to use a delegate, but I couldn't get it to work.
Here is the full First Controller:
import UIKit
class ChessTimer: UIViewController {
#IBOutlet weak var playerTimer1: UILabel!
#IBOutlet weak var playerTimer2: UILabel!
var timer = Timer()
var time = 10
var isTimerRunning = false
override func viewDidLoad() {
super.viewDidLoad()
if isTimerRunning == false {
runTimer()
}
}
#IBAction func restartButton(_ sender: UIButton) {
}
#IBAction func pausePressed(_ sender: UIButton) {
timer.invalidate()
}
#IBAction func settingsPressed(_ sender: UIButton) {
performSegue(withIdentifier: "goToSettings", sender: self)
}
func runTimer() {
timer = Timer.scheduledTimer(timeInterval: 1, target: self,selector:
(#selector(ChessTimer.updateTimer)),userInfo: nil, repeats: true)
isTimerRunning = true
}
#objc func updateTimer() {
if storedTime! < 1 {
timer.invalidate()
playerTimer1.text = "00:00"
playerTimer2.text = "00:00"
}
else {
storedTime! -= 1
playerTimer1.text = prodTimeString(time: TimeInterval(storedTime)!)
}
}
func prodTimeString(time: TimeInterval) -> String {
let prodMinutes = Int(time) / 60 % 60
let prodSeconds = Int(time) % 60
return String(format: "%02d:%02d", prodMinutes, prodSeconds)
}
#IBAction func playerButton1(_ sender: UIButton) {
}
#IBAction func playerButton2(_ sender: UIButton) {
}
}
extension ChessTimer: SettingsControllerDelegate {
func storedTimeTimer() {
}
}
This is the second full controller
import UIKit
class SettingsController: UIViewController {
var bullet = "03:00"
var blitz = "05:00"
var rapid = "10:00"
var storedTime = 0
var delegate: SettingsControllerDelegate?
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
}
#IBAction func bulletPressed(_ sender: UIButton) {
var storedTime = bullet
self.delegate?.storedTimeTimer()
self.navigationController?.popViewController(animated: true)
}
#IBAction func blitzPressed(_ sender: UIButton) {
var storedTime = blitz
}
#IBAction func rapidPressed(_ sender: UIButton) {
var storedTime = rapid
}
}
protocol SettingsControllerDelegate {
func storedTimeTimer()
}

Answer 1

This can be achieved using a Constants.swift file.
Click File -> New -> File -> Swift File and then name it Constants.swift.
In Constants.swift, declare var storedTime = 0.
Delete var storedTime = 0 from your view controllers, you'll only need it in Constants.swift. (So delete it from SettingsController, etc.)
The storedTime variable will now be public to all view controllers. 👍
Hope this helps someone!