swift - 默认值太复杂，无法使用基本的 '+' 运算符进行编译

Question

func updateTotalScore() -> Int {
        var totalScoreDefault = NSUserDefaults.standardUserDefaults()

        var highScoreAB1 = defaults.integerForKey("highScoreAB1")

        var highScoreAB2 = defaults.integerForKey("highScoreAB2")

        var highScoreAB3 = defaults.integerForKey("highScoreAB3")

        var highScoreAB4 = defaults.integerForKey("highScoreAB4")
        var highScoreAB5 = defaults.integerForKey("HighScoreAB5")
        var highScoreAB6 = defaults.integerForKey("highScoreAB6")
        var highScoreAB7 = defaults.integerForKey("highScoreAB7")
    totalScoreDefault =
      (defaults.integerForKey("highScoreAB1") + defaults.integerForKey("highScoreAB2")) + (defaults.integerForKey("highScoreAB3") +   defaults.integerForKey("highScoreAB4")) + (defaults.integerForKey("highScoreAB5") + defaults.integerForKey("highScoreAB6")) + defaults.integerForKey("highScoreAB7") }

添加多个键以获得默认总分会引发以下错误。我尝试将它们分成两两，但没有成功。先感谢您。这是昨天帖子的延续。

Answer 1

作为 Logan 答案的补充，因为您说您遇到“复杂表达式”编译器错误的问题。这应该编译:

func updateTotalScore() -> Int {

           let defaults = NSUserDefaults.standardUserDefaults()

           let totalScoretDefault =
                 defaults.integerForKey("highScoreAB1") +
                 defaults.integerForKey("highScoreAB2") +
                 defaults.integerForKey("highScoreAB3") +
                 defaults.integerForKey("highScoreAB4") +
                 defaults.integerForKey("highScoreAB5") +
                 defaults.integerForKey("highScoreAB6") +
                 defaults.integerForKey("highScoreAB7")

           return totalScoretDefault

}