How do i keep UISwitch state when changing ViewControllers?

Question

When I move from one view controller to another, the switch on the first controller resets itself and does not retain its state. How can I make it save its state when come

Answer 1

Xcode 8.3 • Swift 3.1

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var switchButton: UISwitch!

    override func viewDidLoad() {
        super.viewDidLoad()
        switchButton.isOn =  UserDefaults.standard.bool(forKey: "switchState")
    }

    @IBAction func saveSwitchPressed(_ sender: UISwitch) {
        UserDefaults.standard.set(sender.isOn, forKey: "switchState")
    }
}