Saving an array with GameData

Swift3SaveClass

class Level : NSObject, NSCoding {

    var highScore : Double = 0
    
    var completed : Bool = false
    
    var revealed : Bool = false
  
    required init?(coder: NSCoder) {
        self.highScore = coder.decodeDouble(forKey: "highScore")
        self.completed = coder.decodeBool(forKey: "completed")
        self.revealed = coder.decodeBool(forKey: "revealed")
    }
    
    func encode(with coder: NSCoder) {
        coder.encode(self.highScore, forKey: "highScore")
        coder.encode(self.completed, forKey: "completed")
        coder.encode(self.revealed, forKey: "revealed")
    }
    
}

class LevelData : NSObject, NSCoding {

    /// Some other portion of your code may populate the level defaults and change them as your progress. 
    /// This code is just proof of concept
    var levels = Array<Level>()
    
    override init() {
        super.init()
    }
    
    required init?(coder: NSCoder) {
        super.init()

        let savedLevelData = coder.decodeObject(forKey: "levels") as! Array<Level>
        for (key, data) in savedLevelData.enumerated() {
            let actualLevel = self.levels[key]
            actualLevel.highScore = data.highScore
            actualLevel.completed = data.completed
            actualLevel.revealed = data.revealed
        }
    }
    
    func encode(with coder: NSCoder) {
        coder.encode(self.levels, forKey: "levels")
    }
    
}

See this gist for parent container: https://gist.github.com/veeneck/5521e0b6381051b8387f48ba792ba888

And here is code using the GameData class: https://gist.github.com/veeneck/1d988af6e20e67b131c9cf775f546f16