Save data of a Label in swift - swift

Question

I have a TextField in my settingsController that i can modify selecting a name from a pickerView, the problem is this : when i change the text of my textField i also change the text of a label in another controller, it work but when i close and reopen my app the label is empty, i can't find a way to save the text that i give it with the pickerView.
My code in the settingsController
override func viewDidLoad() {
super.viewDidLoad()
var defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
if let firstNameIsNotNill = defaults.objectForKey("firstName") as? String {
self.currencyLabel.text = defaults.objectForKey("firstName") as String
}
currencyLabel.delegate = self
}
func currencyDoneClicked(sender: UIBarButtonItem) {
var myRow = picker.selectedRowInComponent(0)
currencyLabel.text = pickerData.objectAtIndex(myRow) as NSString
DataManager.sharedInstance.contenitore = currencyLabel.text
var defaults: NSUserDefaults = NSUserDefaults.standardUserDefaults()
defaults.setObject(self.currencyLabel.text, forKey: "firstName")
defaults.synchronize()
}
DataManager :
import UIKit
class DataManager: NSObject {
class var sharedInstance:DataManager {
get {
struct Static {
static var instance : DataManager? = nil
static var token : dispatch_once_t = 0
}
dispatch_once(&Static.token) { Static.instance = DataManager() }
return Static.instance!
}
}
var contenitore : String!
}
And in the other controller :
override func viewDidLoad() {
super.viewDidLoad()
labelCurrency.text = DataManager.sharedInstance.contenitore
}

Answer 1

Just use NSUserDefaults.
NSUserDefaults.standardUserDefaults().setValue(textField.text, forKey: "savedTextField")
Then, when you start up again, populate the field in viewDidLoad or viewWillAppear.
if let text = NSUserDefaults.standardUserDefaults().stringForKey("savedTextField") {
textField.text = text
}