objective-c - Game Center调用排行榜功能没有响应？

Question

我这样调用排行榜:

-(void)viewscores:(SPEvent*)event
{  

    GKLeaderboardViewController *leaderboardController = [[GKLeaderboardViewController alloc] init];      
    if (leaderboardController != nil) {  
        leaderboardController.leaderboardDelegate = self;  

        UIWindow* window = [UIApplication sharedApplication].keyWindow;  
        [window addSubview: self.rootViewController];  
        [self presentModalViewController: leaderboardController animated: YES];  

    }     
}  

当我点击排行榜按钮时，我收到一个错误:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[UIViewController presentModalViewController:animated:]: unrecognized selector sent to class 0x3e2fc7f8'

这正常吗？

Answer 1

您可能应该在 viewController 中调用该函数。在我的一个应用程序中，代码如下所示:

-(IBAction)showLeaderBoard {

    GKLeaderboardViewController *leaderBoardCont = [[GKLeaderboardViewController alloc] init];
    if (leaderBoardCont) {
        leaderBoardCont.category=@"1S";
        leaderBoardCont.timeScope=GKLeaderboardTimeScopeWeek;
        leaderBoardCont.leaderboardDelegate=self;
        [self presentModalViewController:leaderBoardCont animated:YES];
    }

然后你还应该实现委托(delegate)方法:

-(void) leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)viewController {

    [self dismissModalViewControllerAnimated:YES];
    viewController = nil;
}

这里的 1S 是您在 iTunes Connect 中创建的排行榜的标识符。希望这会有所帮助。

编辑:由于您仍然遇到问题，请查看这些教程。它们涵盖了有关排行榜和成就的所有内容。

1st part

2nd part