How to put GameCenter on application with swift? - swift

Question

I made a game using SpriteKit and Xcode 7 beta. I tried to add GameCenter and Leaderboard but the problem is that the score in the leaderboard won't change (HighScore doesn't upload to GameCenter), It stay 0 all the time and I don't know how to fix it. I'm using 2 different files: GameViewController.swift, and PointsLabel.swift
GameViewController.swift:
import GameKit
class GameViewController: UIViewController,UIGestureRecognizerDelegate, GKGameCenterControllerDelegate {
var score: PointsLabel!
override func viewDidLoad() {
super.viewDidLoad()
//initiate gamecenter
func authenticateLocalPlayer(){
let localPlayer = GKLocalPlayer.localPlayer()
localPlayer.authenticateHandler = {(GameViewController, error) -> Void in
if (GameViewController != nil) {
self.presentViewController(GameViewController!, animated: true, completion: nil)
}
else {
print((GKLocalPlayer.localPlayer().authenticated))
}
}
}
}
#IBAction func leaderboard(sender: UIButton) {
saveHighscore(score)
showLeader()
}
//send high score to leaderboard
func saveHighscore(score:Int) {
//check if user is signed in
if GKLocalPlayer.localPlayer().authenticated {
let scoreReporter = GKScore(leaderboardIdentifier: "Leaderboard_01")
scoreReporter.value = Int64(score)
let scoreArray: [GKScore] = [scoreReporter]
GKScore.reportScores(scoreArray, withCompletionHandler: {error -> Void in
if error != nil {
print("error")
}
})
}
}
//shows leaderboard screen
func showLeader() {
let vc = self.view?.window?.rootViewController
let gc = GKGameCenterViewController()
gc.gameCenterDelegate = self
vc?.presentViewController(gc, animated: true, completion: nil)
}
}
//hides leaderboard screen
func gameCenterViewControllerDidFinish(gameCenterViewController: GKGameCenterViewController)
{
gameCenterViewController.dismissViewControllerAnimated(true, completion: nil)
}
There is an Error in this file:
Cannot invoke 'saveHighscore' with an argument list of type '(PointsLabel!)'
on code:
#IBAction func leaderboard(sender: UIButton) {
saveHighscore(score) //<- Here is Error
showLeader()
}
PointsLabel.swift:
import Foundation
import UIKit
import SpriteKit
class PointsLabel: SKLabelNode {
var score:Int = 0
init(num: Int) {
super.init()
fontColor = UIColor.blackColor()
fontSize = 30.0
score = num
text = "\(num)"
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func increment() {
score++
text = "\(score)"
}
func setTo(num: Int) {
self.score = num
text = "\(self.score)"
}
}
I don't know how to fix it!

Answer 1

Your score variable is of type PointsLabel but your saveHighscore function expects an Int as parameter.
Looking at your code, the variable score will be an instance of PointsLabel so I guess you could use the score property of your instanciated class, which is an Int (the fact that you used "score" as a name for both variables is confusing. I suggest changing names to make them more explicit.).
#IBAction func leaderboard(sender: UIButton) {
saveHighscore(score.score)
showLeader()
}