NSUserDefaults for custom object with other custom class variables

Question

I have tried look at the other answers regarding NSUserDefaults, but so far they haven't helped.

I'm trying to save a Player into NSUserDefaults, but the Player class also has two variables for the custom classes Pokemon and Items.

How do I save and load the player? Do I need to separately encode each custom class variable and decode them as well? I'm not sure how it would work.

Here are my classes: Player Class

import Foundation
class Player : NSCoder {

    private var steps = Int()
    private var money = Int()
    private var items = [Item]()
    private var pokemon = [Pokemon]()
    var eggArray = [Int]()

    struct User {
        static var Gold = Player()
    }

    override init(){
        steps = 0
        money = 0
        items = [Item]()
        pokemon = [Pokemon]()
        eggArray = [1, 4, 7, 10, 13, 16, 19, 21, 23, 27, 29, 32, 37, 41, 43, 43, 46, 48, 50, 52, 54, 56, 58, 60, 60, 63, 66, 69, 72, 74, 77, 79, 79, 81, 83, 84, 86, 88, 90, 92, 95, 96, 98, 100, 102, 104, 108, 109, 111, 113, 114, 115, 116, 118, 120, 122, 123, 127, 128, 129, 131, 133, 133, 133, 133, 133, 137, 138, 140, 142, 143, 147, 152, 155, 158, 161, 163, 165, 167, 170, 172, 173, 174, 175, 177, 179, 183, 185, 187, 190, 191, 193, 194, 198, 200, 201, 202, 203, 204, 206, 207, 209, 211, 213, 214, 215, 216, 218, 220, 222, 223, 225, 226, 227, 228, 231, 234, 235, 236, 236, 236, 238, 239, 240, 241, 246]
    }

    init(steps: Int, money: Int, items: [Item], pokemon: [Pokemon], eggArray: [Int]){
        self.steps = steps
        self.money = money
        self.items = items
        self.pokemon = pokemon
        self.eggArray = eggArray
    }

    required convenience init(coder aDecoder: NSCoder) {
        let steps = aDecoder.decodeIntegerForKey("steps")
        let money = aDecoder.decodeIntegerForKey("money")
        let items = aDecoder.decodeObjectForKey("items") as! [Item]
        let pokemon = aDecoder.decodeObjectForKey("pokemon") as! [Pokemon]
        let eggArray = aDecoder.decodeObjectForKey("eggArray") as! [Int]
        self.init(steps: steps, money: money, items: items, pokemon: pokemon, eggArray: eggArray)
    }

    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeInteger(steps, forKey: "steps")
        aCoder.encodeInteger(money, forKey: "money")
        aCoder.encodeObject(items, forKey: "items")
        aCoder.encodeObject(pokemon, forKey: "pokemon")
        aCoder.encodeObject(eggArray, forKey: "eggArray")
    }

}

Item Class

import Foundation
import CoreData

class Item : NSObject{

    var name : String
    var price : Int


    init(item: NSManagedObject){
        name = item.valueForKey("name") as! String
        price = item.valueForKey("price") as! Int

        super.init()

    }

    init(name: String, price: Int){
        self.name = name
        self.price = price

        super.init()

    }

}

Pokemon Class

import Foundation
import SwiftyJSON

class Pokemon : NSObject {

    var dexNo = Int()
    var name = String()

    var type1 = String()
    var type2 = String()

    var hp = Int()
    var atk = Int()
    var def = Int()
    var spatk = Int()
    var spdef = Int()
    var spd = Int()

    var move1 = String()
    var move2 = String()
    var move3 = String()
    var move4 = String()

    var evolves = String()
    var method = String()
    var detail = String()

    var happiness = Int()
    var MAXHAPPINESS = Int()

    var currentEXP = Double()
    var MAXEXP = Double()
    var level = Double()

    var isEgg = Bool()
    var stepsToHatch = Int()

    override init(){

    }

    init(jsonNumber: Int){
        let path : String = NSBundle.mainBundle().pathForResource("PKMNdata", ofType: "json") as String!
        let jsonData = NSData(contentsOfFile: path) as NSData!
        let readableJSON = JSON(data: jsonData, options: NSJSONReadingOptions.MutableContainers, error: nil)

        currentEXP = 0
        MAXEXP = 1000000
        level = 1

        happiness = 0
        MAXHAPPINESS = 255

        isEgg = true
        stepsToHatch = 10000

        self.dexNo = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["DEXNO"].int!
        self.name = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["NAME"].string!
        self.type1 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["TYPE1"].string!
        self.type2 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["TYPE2"].string!
        self.evolves = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["EVOLVES"].string!
        self.method = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["METHOD"].string!
        self.detail = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["DETAIL"].string!
        self.hp = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["HP"].int!
        self.atk = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["ATK"].int!
        self.def = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["DEF"].int!
        self.spatk = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["SPATK"].int!
        self.spdef = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["SPDEF"].int!
        self.spd = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["SPD"].int!
        self.move1 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["MOVE1"].string!
        self.move2 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["MOVE2"].string!
        self.move3 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["MOVE3"].string!
        self.move4 = readableJSON["Pokemon"]["Pokemon\(jsonNumber)"]["MOVE4"].string!

    }

    init(dexNo: Int, name: String, type1: String, type2: String, evolves: String, method: String, detail: String, hp: Int, atk: Int, def: Int, spatk: Int, spdef: Int, spd: Int, move1: String, move2: String, move3: String, move4: String){
        currentEXP = 0
        MAXEXP = 1000000
        level = 1

        happiness = 0
        MAXHAPPINESS = 255

        isEgg = true
        stepsToHatch = 10000

        self.dexNo = dexNo
        self.name = name
        self.type1 = type1
        self.type2 = type2
        self.evolves = evolves
        self.method = method
        self.detail = detail
        self.hp = hp
        self.atk = atk
        self.def = def
        self.spatk = spatk
        self.spdef = spdef
        self.spd = spd
        self.move1 = move1
        self.move2 = move2
        self.move3 = move3
        self.move4 = move4
    }

}

and the two buttons I am using to call save and load (for testing only) there's a global variable: var userDefaults = NSUserDefaults.standardUserDefaults() if it matters.

@IBAction func savePlayer(sender: UIButton) {
    print("save")
    userDefaults = NSUserDefaults.standardUserDefaults()
    let encodedData = NSKeyedArchiver.archivedDataWithRootObject(Player.User.Gold)
    userDefaults.setObject(encodedData, forKey: "player")
    userDefaults.synchronize()
}


@IBAction func loadPlayer(sender: UIButton) {
    print("load")
    let decoded  = userDefaults.objectForKey("player") as! NSData
    let decodedPlayer = NSKeyedUnarchiver.unarchiveObjectWithData(decoded) as! Player
    Player.User.Gold = decodedPlayer
}

Right now I get an error when saving, which I assume is for the saving the item and Pokemon variables in the Player class.

Sweeper · Accepted Answer · 2016-09-25 07:19:59Z

2

Actually, you must make Player, Item and Pokemon conform to NSCoding, not NSCoder.

Conforming to NSCoding basically lets you define a way to encode and decode an object of the conforming class, while an NSCoder subclass does the actual encoding and/or decoding.

You want to archive a Player:

let encodedData = NSKeyedArchiver.archivedDataWithRootObject(Player.User.Gold)

However, since Player, Item and Pokemon don't conform to NSCoding, NSKeyedUnarchiver has no idea how to encode them! As a result, an error appears.

edited Sep 25, 2016 at 7:19

answered Sep 25, 2016 at 7:14

Sweeper

292k23 gold badges260 silver badges438 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

impo Over a year ago

I think I understand! I'll mess with it and see if it works, just dreading encoding all that whole pokemon class

impo Over a year ago

works perfectly! I was stuck on this for so long, thank you very much!

Collectives™ on Stack Overflow

NSUserDefaults for custom object with other custom class variables

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related