SAVE OBJECT TO DISC

GameData.swift

//  Created by efe ertugrul on 21/07/2017.
//  Copyright © 2017 efe ertugrul. All rights reserved.
//

import Foundation
import SpriteKit

let DATA_KEY = "key"

class GameData : JSONObject, NSCoding
{
    var player : SKSpriteNode?
    var mob1 : SKSpriteNode?
    var mob2 : SKSpriteNode?
    var mob3 : SKSpriteNode?
    var mob4 : SKSpriteNode?
    var mob5 : SKSpriteNode?
    
    override init()
    {
        super.init()
    }
    
    required init?(coder aDecoder: NSCoder)
    {
        self.player = aDecoder.decodeObject(forKey: "player") as? SKSpriteNode
        self.mob1 = aDecoder.decodeObject(forKey: "mob1") as? SKSpriteNode
        self.mob2 = aDecoder.decodeObject(forKey: "mob2") as? SKSpriteNode
        self.mob3 = aDecoder.decodeObject(forKey: "mob3") as? SKSpriteNode
        self.mob4 = aDecoder.decodeObject(forKey: "mob4") as? SKSpriteNode
        self.mob5 = aDecoder.decodeObject(forKey: "mob5") as? SKSpriteNode
    }

    
    func encode(with aCoder: NSCoder)
    {
        aCoder.encode(self.player, forKey: "player")
        aCoder.encode(self.mob1, forKey: "mob1")
        aCoder.encode(self.mob2, forKey: "mob2")
        aCoder.encode(self.mob3, forKey: "mob3")
        aCoder.encode(self.mob4, forKey: "mob4")
        aCoder.encode(self.mob5, forKey: "mob5")
    }


    func saveGameData()
    {
        let prefs = UserDefaults.standard
        let myEncodedObject : Data = NSKeyedArchiver.archivedData(withRootObject: self)
        
        prefs.setValue(myEncodedObject, forKey: DATA_KEY)
        prefs.synchronize()
    }
    
    func removeGameData()
    {
        let prefs = UserDefaults.standard
        prefs.removeObject(forKey: DATA_KEY)
        prefs.synchronize()
    }
    
    func currentGameData() -> GameData?
    {
        let prefs = UserDefaults.standard
        let myEncodedObject : Data? = prefs.object(forKey: DATA_KEY) as? Data
        
        if myEncodedObject == nil
        {
            return nil
        }
        
        let data : GameData = NSKeyedUnarchiver.unarchiveObject(with: myEncodedObject!) as! GameData
        
        return data
    }
    
    public func dictionaryRepresentation() -> [String : Any?]
    {
        
        var dictionary = [String : Any?]()
        
        dictionary["player"] = self.player
        dictionary["mob1"] = self.mob1
        dictionary["mob2"] = self.mob2
        dictionary["mob3"] = self.mob3
        dictionary["mob4"] = self.mob4
        dictionary["mob5"] = self.mob5
        
        return dictionary
    }

}

GameScene.swift

//  Created by efe ertugrul on 21/07/2017.
//  Copyright © 2017 efe ertugrul. All rights reserved.
//

import Foundation
import SpriteKit

class GameScene : SKScene
{
    var player : SKSpriteNode = SKSpriteNode()
    var  mob1 : SKSpriteNode = SKSpriteNode()
    var  mob2 : SKSpriteNode = SKSpriteNode()
    var  mob3 : SKSpriteNode = SKSpriteNode()
    var  mob4 : SKSpriteNode = SKSpriteNode()
    var  mob5 : SKSpriteNode = SKSpriteNode()

    var gameData : GameData = GameData.init()

    override func didMove(to view: SKView)
    {
        if gameData.currentGameData() == nil
        {
            let dict = ["player" : player,
                        "mob1" : mob1,
                        "mob2" : mob2,
                        "mob3" : mob3,
                        "mob4" : mob4,
                        "mob5" : mob5] as [String : Any]
            gameData = GameData.init(withDictionary: dict)
            gameData.saveGameData()
        }
        else
        {
            gameData = gameData.currentGameData()!
        }

        print(gameData.dictionaryRepresentation)

    }
}