游戏中心iOS 7无法使用

Question

我跟随 Ray Wenderlich 的教程实现了 iOS 7 的 Game Center。

http://www.raywenderlich.com/3276/game-center-tutorial-for-ios-how-to-make-a-simple-multiplayer-game-part-12

然而，我没有收到登录提示，也没有出现欢迎回来的横幅。尝试了很多教程，似乎无法在iOS 7上运行。以下是我的代码：

GCHelper.h

#import <Foundation/Foundation.h>
#import <GameKit/GameKit.h>

@interface GCHelper : NSObject {
    BOOL gameCenterAvailable;
    BOOL userAuthenticated;
}

@property (assign, readonly) BOOL gameCenterAvailable;

+ (GCHelper *)sharedInstance;
- (void)authenticateLocalUser;

@end

GCHelper.m

#import "GCHelper.h"

@implementation GCHelper

@synthesize gameCenterAvailable;

#pragma mark Initialization

static GCHelper *sharedHelper = nil;
+ (GCHelper *) sharedInstance {
    if (!sharedHelper) {
        sharedHelper = [[GCHelper alloc] init];
    }
    return sharedHelper;
}

- (BOOL)isGameCenterAvailable {
    // check for presence of GKLocalPlayer API
    Class gcClass = (NSClassFromString(@"GKLocalPlayer"));

    // check if the device is running iOS 4.1 or later
    NSString *reqSysVer = @"4.1";
    NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
    BOOL osVersionSupported = ([currSysVer compare:reqSysVer
                                           options:NSNumericSearch] != NSOrderedAscending);

    return (gcClass && osVersionSupported);
}

- (id)init {
    if ((self = [super init])) {
        gameCenterAvailable = [self isGameCenterAvailable];
        if (gameCenterAvailable) {
            NSNotificationCenter *nc =
            [NSNotificationCenter defaultCenter];
            [nc addObserver:self
                   selector:@selector(authenticationChanged)
                       name:GKPlayerAuthenticationDidChangeNotificationName
                     object:nil];
        }
    }
    return self;
}

- (void)authenticationChanged {

    if ([GKLocalPlayer localPlayer].isAuthenticated && !userAuthenticated) {
        NSLog(@"Authentication changed: player authenticated.");
        userAuthenticated = TRUE;
    } else if (![GKLocalPlayer localPlayer].isAuthenticated && userAuthenticated) {
        NSLog(@"Authentication changed: player not authenticated");
        userAuthenticated = FALSE;
    }

}

#pragma mark User functions

- (void)authenticateLocalUser {

    if (!gameCenterAvailable) return;

    NSLog(@"Authenticating local user...");
    if ([GKLocalPlayer localPlayer].authenticated == NO) {
        [[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:nil];
    } else {
        NSLog(@"Already authenticated!");
    }
}

@end

在我的应用程序完成启动方法中，我有以下代码。

[[GCHelper sharedInstance] authenticateLocalUser];

是因为我使用的 authenticateWithCompletionHandler 已经被弃用了吗？

- Sami

---

@sami- 把你的身份验证代码放在这里。 - Vivek Sehrawat

@VivekSehrawat 我已经添加了我的代码。 - Sami

@Sami- 你看过苹果的GKTapper示例代码吗？ - Vivek Sehrawat

是的，我看了一下并尝试实现它，但没有成功。 - Sami

@sami- 你试过我的答案了吗？ - Vivek Sehrawat

Answer 1

以下是我用于显示iOS7游戏中心登录的代码。

gamecentercontrol.h

#import <Foundation/Foundation.h>
#import <GameKit/GameKit.h>

@interface gamecentercontrol : NSObject {

    BOOL gameCentreAvailable;
    BOOL userAuthenticated;

}

@property (assign, readonly) BOOL gameCentreAvailable;

+ (gamecentercontrol *)sharedInstance;

-(void)authenticateLocalUser;


@end

gamecentercontrol.m

#import "gamecentercontrol.h"

@interface gamecentercontrol () <GKGameCenterControllerDelegate> {

    BOOL _gameCenterFeaturesEnabled;

}
@end


@implementation gamecentercontrol

@synthesize gameCentreAvailable;

static gamecentercontrol *sharedControl = nil;
+ (gamecentercontrol *) sharedInstance {
    if (!sharedControl) {
        sharedControl = [[gamecentercontrol alloc]init];
    }
    return sharedControl;
}

-(BOOL)isGameCentreAvailable {
    // check for presence of GKLocalPlayer API
    Class gcClass = (NSClassFromString(@"GKLocalPlayer"));

    //check if the device is running iOS 4.1 or later
    NSString *reqSysVer = @"4.1";
    NSString *currSysVer = [[UIDevice currentDevice] systemVersion];
    BOOL osVersionSupported = ([currSysVer compare:reqSysVer options:NSNumericSearch] != NSOrderedAscending);

    return (gcClass && osVersionSupported);
}

- (id)init {
    if ((self = [super init])) {

        gameCentreAvailable = [self isGameCentreAvailable];
        if (gameCentreAvailable) {
            NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
            [nc addObserver:self selector:@selector(authenticationChanged) name:GKPlayerAuthenticationDidChangeNotificationName object:nil];
        }

    }
    return self;
}


- (void)authenticationChanged {

   if ([GKLocalPlayer localPlayer].isAuthenticated && !userAuthenticated) {
        NSLog(@"Authentication Changed. User Authenticated");
        userAuthenticated = TRUE;
    }
    else if (![GKLocalPlayer localPlayer].isAuthenticated && userAuthenticated) {

        NSLog(@"Authentication Changed. User Not Authenticated");
        userAuthenticated = FALSE;
    }

}


-(void) authenticateLocalUser {
    if ([GKLocalPlayer localPlayer].authenticated == NO) {
        GKLocalPlayer* localPlayer = [GKLocalPlayer localPlayer];

    localPlayer.authenticateHandler = ^(UIViewController *gcvc,NSError *error) {

        if(gcvc) {

            [self presentViewController:gcvc];
        }
        else {
            _gameCenterFeaturesEnabled = NO;
        }
    };
    }

    else if ([GKLocalPlayer localPlayer].authenticated == YES){
        _gameCenterFeaturesEnabled = YES;
    }

}

-(UIViewController*) getRootViewController {
    return [UIApplication sharedApplication].keyWindow.rootViewController;
}

-(void)presentViewController:(UIViewController*)gcvc {
    UIViewController* rootVC = [self getRootViewController];
    [rootVC presentViewController:gcvc animated:YES completion:nil];
}


-(void)gameCenterViewControllerDidFinish:(GKGameCenterViewController *)gameCenterViewController {


} 
@end

那么只需使用

。

[[gamecentercontrol sharedInstance] authenticateLocalUser]

在您的视图控制器文件中，无论何时您想要完成身份验证，都可以这样做。

- andyc101

Answer 2

从苹果示例代码中导入“GameCenterManager.h”。将项目目标设置为iOS 6.0，在viewdidload中放置代码，它将正常工作。

   @property (nonatomic, retain) GameCenterManager *gameCenterManager;

    if([GameCenterManager isGameCenterAvailable])
      {
        self.gameCenterManager= [[GameCenterManager alloc] init];
            [self.gameCenterManager setDelegate: self];
        [self.gameCenterManager authenticateLocalUser];
        }

- Vivek Sehrawat

---

请使用以下链接设置带有排行榜的游戏中心： "https://developer.apple.com/library/ios/documentation/LanguagesUtilities/Conceptual/iTunesConnectGameCenter_Guide/Leaderboards/Leaderboards.html" - dheerendra

Answer 3

///////just Update the method 

- (void) authenticateLocalPlayer

{

GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];

    localPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error)
{


viewController=[[UIViewController alloc] init];

         if (viewController != nil)

         {

             //showAuthenticationDialogWhenReasonable: is an example method name. Create your own method that displays an authentication view when appropriate for your app.

             [self showAuthenticationDialogWhenReasonable: viewController];

         }

         else if (localPlayer.isAuthenticated)

         {

             //authenticatedPlayer: is an example method name. Create your own method that is called after the local player is authenticated.

             [self authenticatedPlayer: localPlayer];

         }

         else

         {

             [self disableGameCenter];

         }

     };

}

- Anuj Saini

---

欢迎来到Stack Overflow！虽然这段代码可能解决了问题，但包括解释真的有助于提高您的帖子质量。请记住，您正在为未来的读者回答问题，而这些人可能不知道您提出代码建议的原因。 - NathanOliver