swift - 如何快速将GameCenter放到应用程序上？

Question

我使用 SpriteKit 和 Xcode 7 beta 制作了一个游戏。我尝试添加 GameCenter 和 Leaderboard，但问题是排行榜中的分数不会改变(HighScore 不会上传到 GameCenter)，它始终保持 0，我不知道如何修复它。我使用 2 个不同的文件:GameViewController.swift 和 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)

}

此文件中有一个错误:

Cannot invoke 'saveHighscore' with an argument list of type '(PointsLabel!)'

代码:

@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)"
 }
}

我不知道如何解决它!

Answer 1

您的score变量的类型为PointsLabel但是你的saveHighscore函数需要 Int作为参数。

查看您的代码，变量 score将是PointsLabel的一个实例所以我想你可以使用 score你的实例化类的属性，它是 Int (您使用“score”作为两个变量的名称这一事实令人困惑。我建议更改名称以使它们更明确。)。

@IBAction func leaderboard(sender: UIButton) {
    saveHighscore(score.score)
    showLeader()
}