Make variable equal to UserDefaults for timer - ios

Question

I have a UIProgress view that takes 60 seconds to go across the screen, but how do I make it where rather than having a set time 'var seconds = 60' I have the UserDefault string be the time? (Not all the code is included.)
import UIKit
class MinuteMeditation: UIViewController {
#IBOutlet weak var progressController: UIProgressView!
#IBOutlet weak var statusLabel: UILabel!
#IBOutlet weak var timeLabel: UILabel!
let savedTime = UserDefaults.standard.string(forKey: "time")
var seconds = 60 // THIS IS WHERE I WANT THE USER DEFAULTS ^
var timer = Timer()
var isTimerRunning = false
var resumeTapped = false
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
runTimer()

Answer 1

One way is to assign the value at some point in the UIViewControllers life-cycle, for example, you could use viewWillLoad if you want to use the saved value EVERY time the view is shown, or viewLoaded if you only want to set when the view is first loaded by the system, for example...
class MinuteMeditation: UIViewController {
#IBOutlet weak var progressController: UIProgressView!
#IBOutlet weak var statusLabel: UILabel!
#IBOutlet weak var timeLabel: UILabel!
var seconds: TimeInterval = 60.0 // THIS IS WHERE I WANT THE USER DEFAULTS ^
var timer = Timer()
var isTimerRunning = false
var resumeTapped = false
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
if let savedTime = UserDefaults.standard.string(forKey: "time"), let time = Double(savedTime) {
seconds = time
}
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
runTimer()
}
}
Just remember, this will ALWAYS override any value previous set. If you prefer to only use the saved value if the value hasn't previously been set, you will need to make seconds optional and assign a default value when it hasn't previously been set and there is no saved value
Another option is to make seconds a computed value...
class MinuteMeditation: UIViewController {
#IBOutlet weak var progressController: UIProgressView!
#IBOutlet weak var statusLabel: UILabel!
#IBOutlet weak var timeLabel: UILabel!
var seconds: TimeInterval {
guard let savedTime = UserDefaults.standard.string(forKey: "time"), let time = Double(savedTime) else {
return 60.0
}
return time
}
var timer = Timer()
var isTimerRunning = false
var resumeTapped = false
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
runTimer()
}
}
This does mean that the value will never be settable directly, it will only be settable via the UserDefaults