将分数添加到NSUserDefault

Question

有一些逻辑，但它不像我想要的那样工作。一切都很好，直到coinNumber成为0然后它重新启动到100（var coins = 100）

目标是从100开始。然后当你玩它有 - 或+硬币并且它保存到另一个变量。

public var coins = 100 // at start got 100 coins


var coinNumber = NSUserDefaults.standardUserDefaults().integerForKey("coins")

func addCoins400() {  // adding 400 coins and save it
        coins = coins + 400

        let CoinsDefault = NSUserDefaults.standardUserDefaults()
        CoinsDefault.setInteger(coins, forKey: "coins")

    }

if coinNumber != 0 {  
            coins = coinNumber
        }

@IBAction func showAnswer(sender: UIButton) {

        if coins >= 50 {
          // I show answer
            coins = coins - 50


            let CoinsDefault = NSUserDefaults.standardUserDefaults()
            CoinsDefault.setInteger(coins, forKey: "coins")
            CoinsDefault.synchronize()

Answer 1

尝试 synchronizing NSUserDefaults

  public var coins = 100 // at start got 100 coins



var coinNumber = NSUserDefaults.standardUserDefaults().integerForKey("coins")

func addCoins400() {  // adding 400 coins and save it
        coins = coins + 400

        let CoinsDefault = NSUserDefaults.standardUserDefaults()
        CoinsDefault.setInteger(coins, forKey: "coins")
        CoinsDefault.synchronize()
    }

if coinNumber != 0 {  
            coins = coinNumber
        }