SKAction playSoundFileNamed没有接收到两个连续的电话后工作 [英] SKAction playSoundFileNamed doesn't work after receiving two consecutive phone calls

问题描述

我试图找出为什么 playSoundFileNamed 的接收到两个连续的电话后，无法正常工作。其实它的工作原理是接到第一个电话之后。再现步骤是：

I am trying to figure out why playSoundFileNamed doesn't work after receiving two consecutive phone calls. Actually it works only after the first phone call is received. Reproducing steps are:

1. 开始游戏


2. 等待一个电话并转到后台


3. 电话呼叫结束（拒绝或中断调用者）


4. 返回到前台

在此之后，从播放声音 的touchesBegan 的仍然有效。

After this, playing the sound from touchesBegan still works.

当我重复这些步骤从上面（第一步是跳过），从机制的touchesBegan停止工作。不知道为什么会这样......这里是code能产生描述的行为：

When I repeat the steps from above (first step is skipped), mechanism from touchesBegan stops working. Not sure why is this happening...Here is the code which can produce described behaviour:

@interface GameScene()

@property (nonatomic, strong) SKAction *sound;
@end

@implementation GameScene

-(void)didMoveToView:(SKView *)view {
    self.sound = [SKAction playSoundFileNamed:@"sound1.wav" waitForCompletion:NO];
}

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    /* Called when a touch begins */
    [self runAction:self.sound];
}
@end

我知道有与此相关的SO一些问题，但鉴于答案相关的解决方法。 我没有兴趣的解决方法，而为什么会出现这种情况？是它在某种程度上关系到AVAudioSession？ （可能没有）我知道我可以使用AVAudioPlayer作为一种解决方法，但仍然不知道有多少是用于高性能打了很多简单的短声音...

I know there are some questions related to this on SO, but given answers are related to workarounds. I am not interested in workaround, but rather why is this happening? Is it somehow related to AVAudioSession ? (probably not) I know I could use AVAudioPlayer as a workaround, but still not sure how much is that performant for playing a lot of simple short sounds...

推荐答案

该SKAction playSoundFileNamed 是越野车的问候背景和前景之间的过渡程序。这就是为什么你有这个问题的原因。我不知道如果这个问题已经在iOS中9得到纠正。

The SKAction playSoundFileNamed is buggy in regards to the app transitioning between background and foreground. That's the reason why you are having this issue. I am not sure if this problem has been corrected in iOS 9.

至于解决方法，你说你没兴趣，但我会包括一个完成的缘故。使用AVAudioPlayer代替SKAction。 AVAP已经停止，并开始根据您的应用程序的状态（通过其代表）的能力。

As for a workaround, you stated you're not interest but I will include one for completion's sake. Use AVAudioPlayer instead of SKAction. AVAP has the ability to stop and start (using its delegates) based on your app's state.

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