ios - Spritekit - 如何在特定场景中隐藏 iAd 横幅？

Question

我目前正在从事 Spritekit 项目。

我有 3 个场景:MainMenu、Game、Gameover

我希望仅当用户处于 Game 场景和 Gameover 场景时才显示 iAd。

这是我当前在 ViewController.m 中的 iAd 代码:

- (void) viewWillLayoutSubviews
{

        // For iAds
        _bannerView = [[ADBannerView alloc] initWithAdType:ADAdTypeBanner];
        _bannerView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
        _bannerView.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth;
        _bannerView.delegate = self;
        _bannerView.hidden = YES;
        [self.view addSubview:_bannerView];
}

#pragma mark - iAds delegate methods
    - (void)bannerViewDidLoadAd:(ADBannerView *)banner {
        // Occurs when an ad loads successfully
        _bannerView.hidden = NO;
    }

    - (void)bannerView:(ADBannerView *)banner didFailToReceiveAdWithError:(NSError *)error {
        // Occurs when an ad fails to load
        _bannerView.hidden = YES;
    }

    - (BOOL)bannerViewActionShouldBegin:(ADBannerView *)banner willLeaveApplication:(BOOL)willLeave {
        // Occurs when the user taps on ad and opens it


        return YES;
    }

    - (void)bannerViewActionDidFinish:(ADBannerView *)banner {
        // Occurs when the ad finishes full screen
    }

问题是，由于 MainMenu 场景是第一个显示的场景，横幅会在成功加载广告后显示在那里。如何让它只在用户处于 Game 场景和 Gameover 场景时出现？

Answer 1

这里最好的方法是使用NSNotificationCenter:

在您的 - (void) viewWillLayoutSubviews
中注册通知

 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:@"hideAd" object:nil];
 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleNotification:) name:@"showAd" object:nil];

并在这里处理通知

- (void)handleNotification:(NSNotification *)notification
 { 
    if ([notification.name isEqualToString:@"hideAd"])
        {
             // hide your banner;
    }else if ([notification.name isEqualToString:@"showAd"]) 
        {
             // show your banner
    }
 }

在你的场景中

[[NSNotificationCenter defaultCenter] postNotificationName:@"showAd" object:nil]; //Sends message to viewcontroller to show ad.

 [[NSNotificationCenter defaultCenter] postNotificationName:@"hideAd" object:nil]; //Sends message to viewcontroller to hide ad.

谢谢，祝你好运。