UIViewController & UITableViewController - Settings Page - ios

Question

I've made a little app on the UIViewController and I want it to have a settings page.
I made a button on it which leads to a UITableView Controller, so far all I have on it is a toggle for Vibrate but when I turn the switch off, go to main, and return back the switch is reset to original position ('on').
How can I make it so the state stays and where do I define the action for the toggle?

Answer 1

You should at start, load the UI with the settings current values.
In the viewWillAppear or even in viewDidLoad, you can just set the options, it will make the view shows the data as is set.

Answer 2

I make a simple project to demonstrate how to save the switch state. Here's the sample code and you can download the whole project here: https://drive.google.com/file/d/0B2_OK50NaRBpVVE4ZzhORUJJaG8/view?usp=sharing
class ViewController: UIViewController {
#IBOutlet weak var mySwitch: UISwitch!
#IBOutlet weak var stateLabel: UILabel!
let defaults = NSUserDefaults.standardUserDefaults()
let savedKey = "switch_state"
override func viewDidLoad() {
super.viewDidLoad()
self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Clear", style: .Plain, target: self, action: "clearSettings")
mySwitch.addTarget(self, action: "toggleSwitch", forControlEvents: .ValueChanged)
// Retrieve data from NSUserDefaults & update switch state and label
let switchState = defaults.boolForKey(savedKey)
mySwitch.setOn(switchState, animated: true)
self.stateLabel.text = "Current state: \(mySwitch.on)"
}
func toggleSwitch() {
// Each time we toogle switch, save switch state
defaults.setBool(mySwitch.on, forKey: savedKey)
defaults.synchronize()
// Update label
self.stateLabel.text = "Current state: \(mySwitch.on)"
}
func clearSettings() {
// Remove saved switch state
defaults.removeObjectForKey(savedKey)
}
}