我使用 SpriteKit 和 Xcode 7 beta 制作了一个游戏。我尝试放置 GameCenter 和 Leaderboard，但问题是排行榜中的分数不会改变，它始终保持 0（游戏的高分不会保存在 Leaderboard 中），我不知道如何修复它。我使用 3 个不同的文件：游戏场景.swift, GameViewController.swift, and PointsLabel.swift.
游戏场景.swift
func addPointsLabels() {
let pointsLabel = PointsLabel(num: 0)
pointsLabel.position = CGPointMake(30.0, view!.frame.size.height - 40)
pointsLabel.name = "pointsLabel"
addChild(pointsLabel)
//High Score
let highscoreLabel = PointsLabel(num: 0)
highscoreLabel.name = "highscoreLabel"
highscoreLabel.position = CGPointMake(view!.frame.size.width - 35, view!.frame.size.height - 40)
addChild(highscoreLabel)
}
func loadHighscore() {
let defaults = NSUserDefaults.standardUserDefaults()
let highscoreLabel = childNodeWithName("highscoreLabel") as! PointsLabel
highscoreLabel.setTo(defaults.integerForKey("highscore"))
}
GameViewController.swift：
import GameKit
class GameViewController: UIViewController,UIGestureRecognizerDelegate, GKGameCenterControllerDelegate {
var scoreManager = PointsLabel(num: 0)
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(scoreManager.score)
scoreManager.increment()
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)
}
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)"
}
}
我认为问题出在文件 GameViewController.swift 的代码中：
@IBAction func leaderboard(sender: UIButton) {
saveHighscore(scoreManager.score)
scoreManager.increment() //<-- Here
showLeader()
}
也许我没有把它放在正确的地方
scoreManager.increment()
