How would I save “coins” in my game in Swift SpriteKit?

Question

I have this game where the user collects coins and I want them to be able to save them and use the coins for in app purchaces. How would I do this? Could I use NSUserDefaults fo

Answer 1

Reseting the coinScore

NSUserDefaults.standardUserDefaults().removeObjectForKey("coinScore")

loading the saved score

var coinScore =  NSUserDefaults.standardUserDefaults().integerForKey("coinScore")

var coins = 5

updating the coinScore

if coins > coinScore  {
    coinScore = coins
    NSUserDefaults().setInteger(coinScore, forKey: "coinScore")
}

println( NSUserDefaults().integerForKey("coinScore").description )

coins += 20

if coins > coinScore  {
    coinScore = coins
    NSUserDefaults().setInteger(coinScore, forKey: "coinScore")
}

println( NSUserDefaults().integerForKey("coinScore").description )