Setting initial state of UISwitch - ios

Question

I have a UISwitch in the settings menu in my app and I am having difficulties trying to get the initial state to be 'on'. Even if I set the initial state to be 'on' in the attributes inspector, it still sets it to 'off' when the is opened for the first time.
Basically at the moment, the switch will be set to 'off' when the app opened for the first time however it does save the state if you change it so that works fine.
Here is my code:
#IBAction func dupOffOnSwitch(sender: AnyObject) {
if dupSwitch.on == true {
autoAdjust = true
println(autoAdjust)
} else {
autoAdjust = false
println(autoAdjust)
}
override func viewWillAppear(animated: Bool) {
dupSwitch.on = NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings")
println(NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings"))
}
'autoAdjust' is declared under import UIKit as true.

Answer 1

In order to set NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings") to true for the first time you ever launch your app, you can replace the application:didFinishLaunchingWithOptions: method of your AppDelegate class with this code:
func application(application: UIApplication!, didFinishLaunchingWithOptions launchOptions: NSDictionary!) -> Bool {
//If app has never been launched...
if !NSUserDefaults.standardUserDefaults().boolForKey("isNotFirstLaunch") {
//Set autoAdjustSettings and isNotFirstLaunch to true
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "autoAdjustSettings")
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "isNotFirstLaunch")
//Sync NSUserDefaults
NSUserDefaults.standardUserDefaults().synchronize()
}
return true
}
Of course, you can do the previous code in your UIViewController subclass but the AppDelegate should be the place for those settings.
Once done, your UIViewController subclass should look like this:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var dupSwitch: UISwitch!
#IBAction func dupOffOnSwitch(sender: AnyObject) {
dupSwitch.on = (sender as UISwitch).on //Bool
NSUserDefaults.standardUserDefaults().setBool(dupSwitch.on, forKey: "autoAdjustSettings")
NSUserDefaults.standardUserDefaults().synchronize()
}
override func viewDidLoad() {
super.viewDidLoad()
dupSwitch.on = NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
}
Unless you have a good reason to, I don't think you need to use the viewWillAppear: method in your UIViewController subclass for your NSUserDefaults statements. viewDidLoad: should be the right place for that.

Answer 2

I fixed my issue by adding this:
dupSwitch.on = NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings")
println(NSUserDefaults.standardUserDefaults().boolForKey("autoAdjustSettings"))
userReturnedAuto = NSUserDefaults.standardUserDefaults().boolForKey("userReturnedAuto")
if userReturnedAuto == false {
dupSwitch.on = true
userReturnedAuto = true
NSUserDefaults.standardUserDefaults().setBool(userReturnedAuto, forKey: "userReturnedAuto")
NSUserDefaults.standardUserDefaults().setBool(userReturnedAuto, forKey: "autoAdjustSettings")
}
Probably not the ideal solution but it works.