Cannot invoke 'GameSetting.init' with an argument list of type

Question

import UIKit

struct PropertyKeys {
    static let keyHightScore = "hightScore"
    static let keyLastScore = "lastScore"
    static let keyCurrentScore = "currentScore"
}

class GameSetting: NSObject, NSCoding {

    var hightScore: Int
    var currentScore: Int
    var lastScore: Int

    var life = 3

    override init() {
        hightScore = 0
        currentScore = 0
        lastScore = 0

        super.init()

        loadGameSetting()
    }

    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeInteger(hightScore, forKey: PropertyKeys.keyHightScore)
        aCoder.encodeInteger(currentScore, forKey: PropertyKeys.keyCurrentScore)
        aCoder.encodeInteger(lastScore, forKey: PropertyKeys.keyLastScore)
    }

    required convenience init?(coder aDecoder: NSCoder) {
        var hightScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyHightScore)
        var currentScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyCurrentScore)
        var lastScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyLastScore)

        self.init(hightScore: Int, currentScore: Int, lastScore: Int) {
            self.hightScore = hightScore
            self.currentScore = currentScore
            self.lastScore = lastScore
        }
    }

    func recordScore(score: Int) {
        if score > hightScore { hightScore = score }

        lastScore = score

        saveGameSetting()
    }

    func saveGameSetting() {
        NSUserDefaults.standardUserDefaults().setInteger(hightScore, forKey: PropertyKeys.keyHightScore)
        NSUserDefaults.standardUserDefaults().setInteger(lastScore, forKey: PropertyKeys.keyLastScore)
    }

    func loadGameSetting() {
        hightScore = NSUserDefaults.standardUserDefaults().integerForKey(PropertyKeys.keyHightScore)
        lastScore = NSUserDefaults.standardUserDefaults().integerForKey(PropertyKeys.keyLastScore)
    }

    override var description: String {
        return "HighScore: \(self.hightScore), lastScore: \(self.lastScore), currenScore: \(self.currentScore)"
    }

    func reset() {
        currentScore = 0
    }

    func resetHightScore() {
        hightScore = 0
        lastScore = 0

        saveGameSetting()
    }
}

What is wrong? I don't understand this error.

I can not find anything on this issue.

I want to finished save and load score data, and I am following this example: https://developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson10.html

Answer 1

It looks like you've got a misplaced '}' which lead to adding a misplaced self

Where you have:

required convenience init?(coder aDecoder: NSCoder) {
    var hightScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyHightScore)
    var currentScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyCurrentScore)
    var lastScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyLastScore)

    self.init(hightScore: Int, currentScore: Int, lastScore: Int) {
        self.hightScore = hightScore
        self.currentScore = currentScore
        self.lastScore = lastScore
    }
}

I think you want:

required convenience init?(coder aDecoder: NSCoder) {
    var hightScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyHightScore)
    var currentScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyCurrentScore)
    var lastScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyLastScore)

    self.init(hightScore:hightScore, currentScore:currentScore, lastScore:lastScore)
}

init(hightScore: Int, currentScore: Int, lastScore: Int) {
    self.hightScore = hightScore
    self.currentScore = currentScore
    self.lastScore = lastScore
}

and it doesn't look like there's anyway for the init to fail, so there's no reason for it to be failable, and the vars don't get changed, so make them let:

required convenience init(coder aDecoder: NSCoder) {
    let hightScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyHightScore)
    let currentScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyCurrentScore)
    let lastScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyLastScore)

    self.init(hightScore:hightScore, currentScore:currentScore, lastScore:lastScore)
}

Answer 2

You haven't defined an init method with those arguments. You probably want something like this:

required convenience init?(coder aDecoder: NSCoder) {
    let hightScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyHightScore)
    let currentScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyCurrentScore)
    let lastScore = aDecoder.decodeIntegerForKey(PropertyKeys.keyLastScore)

    self.init()

    self.hightScore = hightScore
    self.currentScore = currentScore
    self.lastScore = lastScore
}

or create a convenience init with the specified arguments:

convenience init(highScore: Int, currentScore: Int, lastScore: Int) {
    self.init()
    self.hightScore = highScore
    self.currentScore = currentScore
    self.lastScore = lastScore
}