进入前台时，iOS 8 中不播放背景音乐

Question

停用正在运行 I/O 的音频会话。在停用音频会话之前，应停止或暂停所有 I/O。

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
    SKView *view = (SKView *)self.window.rootViewController.view;
    ((MyScene *)view.scene).gamePaused = YES;

    [[AVAudioSession sharedInstance] setActive:NO error:nil];
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later. 
    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
    [[AVAudioSession sharedInstance] setActive:NO error:nil];
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
    [[AVAudioSession sharedInstance] setActive:YES error:nil];
}

这是我在 AppDelegate.m 文件中的代码。每当我退出应用程序并重新进入时，我的游戏的背景音乐都不会重新开始播放。此代码适用于 iOS7，但不适用于 iOS8，我想知道如何解决此问题。

Answer 1

我也有同样的问题。我也有退出时暂停和暂停音频 - 在 iOS7 中效果很好 - 但 ios 8 不起作用.. 我已经尝试过 xcode6 和 beta xcode6.1 - 在 ios7 和 ios8 设备上。 ios7 从来没有问题并且按预期工作 - 但 ios8 给我问题，不会暂停或暂停音频.. 真的很烦人！

Answer 2

在Background Modes中选择Audio and Airplay项目，这对我有用。