ios - Save UIPickerView selection to NSUserDefaults swift -

i trying save user's selection uipickerview nsuserdefaults. have found answers in obj-c not swift. here uipickerview code:

func numberofcomponentsinpickerview(pickerview: uipickerview) -> int {         return 1     }     func pickerview(pickerview: uipickerview, numberofrowsincomponent component: int) -> int {         return pickerdata.count     }     func pickerview(pickerview: uipickerview, titleforrow row: int, forcomponent component: int) -> string! {         return pickerdata[row]     }      func pickerview(pickerview: uipickerview, didselectrow row: int, incomponent component: int) {         race = pickerdata[row]     } 

and when press save button, supposed save selected nsuserdefaults. here saving code:

@ibaction func save(sender: anyobject) {         var defaults: nsuserdefaults = nsuserdefaults.standarduserdefaults()         defaults.setobject(race, forkey: "race")     } 

when try display text on label, shows blank:

override func viewdidload() {         super.viewdidload()          self.racelabel.text = defaults.objectforkey("race") as? string 

let me know if question needs clarification, thanks.

update code specified below , work

func pickerview(pickerview: uipickerview, didselectrow row: int, incomponent     component: int) {     race = row    } 

every time select row, function called , argument of parameter row represents row selected in uipickerview.

if assign pickerdata[row] value race, assigning value pickerdata array @ index number represented row selected in uipickerview object.