UserDefaults不显示数据吗？

Question

I am Presenting a View with some text field and button where user can enter some data in that text field and when the user will click the save button that data will be saved in NSUserdefaults and show it on another view but its not working.. Any suggestion plz..

View2 code Which is presented over view1

//The default key value
var _billingAddress = "billingAddress"

//The address text field in present view
@IBOutlet weak var address: UITextField!


//The button action code
 @IBAction func saveBtn(sender: AnyObject) {

    let defaults = NSUserDefaults.standardUserDefaults()
    defaults.setValue(address.text, forKey:_billingAddress)

 }

View1 code to access the key value data

//Label where i want to show the saved value
@IBOutlet weak var billingAddresh: UILabel!

    let defaults = NSUserDefaults.standardUserDefaults()
    if let name = defaults.stringForKey(_billingAddress)
        //Here it shows the error use of unresolved identifier _billingAddress
    {
        billingAddresh.text = name
    }

Its not showing any value Thank you for the help..

Answer 1

when you add on that time we need the defaults.synchronize()

let defaults = NSUserDefaults.standardUserDefaults()
defaults.setValue(address.text, forKey:"billingAddress")

// if you want use else ignore 
defaults.synchronize()

retrieve is

let defaults = NSUserDefaults.standardUserDefaults()
if let name = defaults.stringForKey("billingAddress") // not "_billingAddress"
{
    billingAddresh.text = name
}

// no need in here 
defaults.synchronize()