如何检测是否有其他应用程式正在播放背景音乐？ [英] How do I detect if other apps are playing background audio?

问题描述

我正在为iPhone / iPad的游戏，并且不希望我的背景音乐与音乐的用户可能已经被打造成干扰。

I am making a game for iphone/ipad, and don't want my background music to interfere with music the user might already be playing.

我知道我可以使用MPPlayerController获得iPod应用程序的状态，但如何将我的应用程序计算出，如果别的东西，像潘多拉，打得背景音乐上的iOS4？

I know I can get the state of the iPod app using MPPlayerController, but how would my app figure out if something else, like Pandora, was playing background audio on iOS4?

推荐答案

我终于想通了这一点。我见过很多例子，但不能永远让他们的工作。

I finally figured this out. I had seen plenty of examples, but couldn't ever get them to work.

大多数例子在那里不指出，对于类似：

Most of the examples out there don't point out that for something like:

    UInt32   propertySize, audioIsAlreadyPlaying;

propertySize = sizeof(UInt32);
AudioSessionGetProperty(kAudioSessionProperty_OtherAudioIsPlaying, &propertySize, &audioIsAlreadyPlaying);

工作，适当的框架添加到您的应用程序是AudioToolbox。我一直试图增加其他音频框架，并始终无缘的那一个。

to work, the proper framework to add to you app is AudioToolbox. I kept trying to add other audio frameworks and always missed that one.

一旦你添加一个工作框架（和它导入到有问题的code文件）只是测试，看看是否audioIsAlreadyPlaying是0或1。

Once you add that frame work (and import it into the code file in question) just test to see if audioIsAlreadyPlaying is zero or one.

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