ios – Swift – 游戏中心不可用

我正试图在我的 Swift游戏中实现Game Center.我有一个菜单视图控制器,用户可以按下“SCORES”按钮,它应该将它们带到Game Center视图控制器.

当按下按钮时,这是在菜单vc中运行的代码：

var gcViewController: GKGameCenterViewController = GKGameCenterViewController()
gcViewController.gameCenterDelegate = self

gcViewController.viewState = GKGameCenterViewControllerState.Leaderboards
gcViewController.leaderboardIdentifier = "VHS"

self.presentViewController(gcViewController, animated: true, completion: nil)

我在Game Center vc中有代码,但我认为它没有机会运行.应用程序在此代码后停止执行(没有断点或错误,只是不允许我点击任何内容)并显示一条弹出消息,内容如下：

Game Center Unavailable
Player is not signed in

我得到的唯一其他响应是在Xcode中,其中以下行打印到日志：

2014-08-29 14:10:33.157 Valley[2291:304785] 17545849:_UIScreenEdgePanRecognizerEdgeSettings.edgeRegionSize=13.000000

我不知道这意味着什么或为什么Game Center不工作.任何人都可以帮忙吗？

假设您已在应用中启用了Game Center并在iTunes Connect中添加了排行榜,那么您需要在显示GC之前对您的播放器进行身份验证.此外,请确保您已在iTunes Connect中创建了一个测试用户,您可以在出现提示时使用该用户登录Game Center.

您的MenuViewController应该在viewDidLoad中验证本地播放器,如下所示：

class MenuViewController: UIViewController,
            GKGameCenterControllerDelegate
{
    var leaderboardIdentifier: String? = nil
    var gameCenterEnabled: Bool = false

    override func viewDidLoad()
    {
        super.viewDidLoad()

        //Your code that sets up your scene or other set up code

        //HERE IS WHERE YOU AUTHENTICATE
        authenticateLocalPlayer()
    }

    func authenticateLocalPlayer()
    {
        var localPlayer = getLocalPlayer() // see GKLocalPlayerHack.h
        localPlayer.authenticateHandler =
            { (viewController : UIViewController!, error : NSError!) -> Void in
                if viewController != nil
                {
                    self.presentViewController(viewController, animated:true, completion: nil)
                }
                else
                {
                    if localPlayer.authenticated
                    {
                        self.gameCenterEnabled = true
                        localPlayer.loadDefaultLeaderboardIdentifierWithCompletionHandler
                        { (leaderboardIdentifier, error) -> Void in
                            if error != nil
                            {
                                print("error")
                            }
                            else
                            {
                                self.leaderboardIdentifier = leaderboardIdentifier
                                print("\(self.leaderboardIdentifier)") //in your example "VHS" should be returned
                            }
                        }
                    }
                    else
                    {
                        print("not able to authenticate fail")
                        self.gameCenterEnabled = false

                        if error
                        {
                            print("\(error.description)")
                        }
                        else
                        {
                            print(    "error is nil")
                        }
                    }
                }
        }
    }


    func gameCenterViewControllerDidFinish(gameCenterViewController: GKGameCenterViewController!)
    {
        gameCenterViewController.dismissViewControllerAnimated(true, completion: nil)
    }    
}

在您成功通过身份验证后,您应该可以使用Game Center.

注意这一行：
var localPlayer = getLocalPlayer()//参见GKLocalPlayerHack.h

为了让它工作,你需要做一点点破解让GKLocalPlayer在Swift中正确实例化.

在Objective-C中创建一个新类,并将文件命名为GKLocalPlayerHack.h / m

在标题中：

//  GKLocalPlayerHack.h
// Issue with GameKit and Swift
// https://stackoverflow.com/questions/24045244/game-center-not-authenticating-using-swift

#import <GameKit/GameKit.h>

@interface GKLocalPlayerHack : NSObject

GKLocalPlayer *getLocalPlayer(void);

@end

在执行文件中：

// GKLocalPlayerHack.m
// Issue with GameKit and Swift
// https://stackoverflow.com/questions/24045244/game-center-not-authenticating-using-swift

#import "GKLocalPlayerHack.h"

@implementation GKLocalPlayerHack

GKLocalPlayer *getLocalPlayer(void)
{
    return [GKLocalPlayer localPlayer];
}

@end

一定要添加：

#import "GKLocalPlayerHack.h"

你的桥头.
感谢@marmph在这个问题上的答案：Game Center not authenticating using Swift