Need help to fix my code when uploading a High Score to a Game Center leaderboard in iOS

Question

With some research, this is what I thought to be the right code. Everything seems to be working and there are NO errors. The first high score uploaded shows on the leaderboard (for both Game Center accounts I am using for testing), but any score uploaded after the initial high score (which should replace it) isn't shown (I have tried using more than one account, same issue). Here is my code (I call for this function when a Button is pressed). Everything loads up fine and the Game Center window closes perfectly with NO errors, but the score for account 1 remains at 0 (which was the first score loaded) while the score for account 2 remains at 2 (which was the first score loaded). (highScore is a saved NSInteger before this function is called) Please help!

 func saveHighscore() {

        //check if user is signed in
        if GKLocalPlayer.localPlayer().authenticated {


            let gameScoreReporter = GKScore(leaderboardIdentifier: "color_runner_leaderboard")

            gameScoreReporter.value = Int64(highScore)

            let scoreArray1: [GKScore] = [gameScoreReporter]

            GKScore.reportScores(scoreArray1, withCompletionHandler: {(NSError) -> Void in
                if NSError != nil {
                    print(NSError!.localizedDescription)
                } else {
                    print("completed Easy")
                }

            })

        }

    }

This code shows the leaderboard:

 //show leaderboard screen
func showLeader() {
    let vc = self.view?.window?.rootViewController
    let gc = GKGameCenterViewController()
    gc.gameCenterDelegate = self
    vc?.presentViewController(gc, animated: true, completion: nil)
}

This code is what uploads the score (which doesn't seem to be working after the FIRST score is loaded) and displays the leaderboard

let highScoreDefault = NSUserDefaults.standardUserDefaults()
    if highScoreDefault.valueForKey("HighScoreSaved") != nil {
        highScore = highScoreDefault.valueForKey("HighScoreSaved") as! NSInteger!
        [saveHighscore()]
    }




    [showLeader()]

Answer 1

Try this:

 func saveHighScore(identifier: String, score: Int) {

    if (GKLocalPlayer.localPlayer().authenticated) {

        let scoreReporter = GKScore(leaderboardIdentifier: identifier)
        scoreReporter.value = Int64(score)

        let scoreArray:[GKScore] = [scoreReporter]

        GKScore.reportScores(scoreArray, withCompletionHandler: {

            error -> Void in

            if (error != nil) {

                print("error")
            }
            else {
              print("Posted score of \(score)")
            }
        })
      }
    }

When you want to save the high score, add this code:

self.saveHighScore("yourLeaderboardName", score: GameState.sharedInstance.highScore)

Add this class. GameState.swift:

import Foundation

class GameState {
  var score: Int
  var highScore: Int
  var coins: Int

  init() {
    // Init
    score = 0
    highScore = 0
    coins = 0

    // Load game state
    let defaults = NSUserDefaults.standardUserDefaults()

    highScore = defaults.integerForKey("highScore")
    coins = defaults.integerForKey("coins")
  }

  func saveState() {
    // Update highScore if the current score is greater
    highScore = max(score, highScore)

    // Store in user defaults
    let defaults = NSUserDefaults.standardUserDefaults()
    defaults.setInteger(highScore, forKey: "highScore")
    defaults.setInteger(coins, forKey: "coins")
    NSUserDefaults.standardUserDefaults().synchronize()
  }

  class var sharedInstance: GameState {
    struct Singleton {
        static let instance = GameState()
    }

    return Singleton.instance
  }
}

And add this helper class in it's own Swift file. Not sure if it's needed. I call it GameKitHelper.swift:

import UIKit
import Foundation
import GameKit

let PresentAuthenticationViewController = "PresentAuthenticationViewController"

class GameKitHelper: NSObject {

static let sharedInstance = GameKitHelper()


var authenticationViewController: UIViewController?
var gameCenterEnabled = false

func authenticateLocalPlayer() {

    //1
    let localPlayer = GKLocalPlayer()
    localPlayer.authenticateHandler = {(viewController, error) in

        if viewController != nil {
            //2
            self.authenticationViewController = viewController

                    NSNotificationCenter.defaultCenter().postNotificationName(PresentAuthenticationViewController, object: self)
        } else if error == nil {
            //3
            self.gameCenterEnabled = true
        }
      }

  }

  func reportAchievements(achievements: [GKAchievement], errorHandler: ((NSError?)->Void)? = nil) {
    guard gameCenterEnabled else {
        return
    }

    GKAchievement.reportAchievements(achievements, withCompletionHandler: errorHandler)
  }

    func showGKGameCenterViewController(viewController: UIViewController) {
      guard gameCenterEnabled else {
        return
    }

    //1
    let gameCenterViewController = GKGameCenterViewController()

    //2
    gameCenterViewController.gameCenterDelegate = self

    //3
    viewController.presentViewController(gameCenterViewController, animated: true, completion: nil)
 }

    func saveHighScore(identifier: String, score: Int) {

      if (GKLocalPlayer.localPlayer().authenticated) {

        let scoreReporter = GKScore(leaderboardIdentifier: identifier)
        scoreReporter.value = Int64(score)

        let scoreArray:[GKScore] = [scoreReporter]

        GKScore.reportScores(scoreArray, withCompletionHandler: {

            error -> Void in

            if (error != nil) {

                print("error")
            }
            else {

                print("Posted score of \(score)")
            }
        })
      }
     }
   }

extension GameKitHelper: GKGameCenterControllerDelegate {
  func gameCenterViewControllerDidFinish(gameCenterViewController: GKGameCenterViewController) {
    gameCenterViewController.dismissViewControllerAnimated(true, completion: nil)
  }
}