应用程序的Info.plist必须包含NSMicrophoneUsageDescription键，其包含字符串值，向用户解释应用程序使用此数据

获得构建拒绝
应用程序的 Info.plist 必须包含带字符串的 NSMicrophoneUsageDescription 键值向用户解释应用程序如何使用此数据。

Got a build rejection The app's Info.plist must contain an NSMicrophoneUsageDescription key with a string value explaining to the user how the app uses this data.

该应用程序不使用麦克风。或者我认为。

The app does not use microphone. Or so I think.

如何追踪使用麦克风的地方？

How do I track down where mic is used?

UPD23112016：鉴于懒惰的答案正在被投票我已经向苹果提交了一项新的功能请求以关闭此安全漏洞。

UPD23112016: given that the lazy answer is being upvoted I've filed a new feature request with apple to close this security hole.

UPD05042017：一旦你代理麦克风访问$ b仍然很麻烦$ b进入某些第三方框架，通过一些半裸的NSMicrophoneUsageDescription
如果用户同意
允许麦克风访问，则无法控制何时何地可以使用它。伙计们，请尽职尽责并精确制作
NSMicrophoneUsageDescription，它反映了当使用被第三方仅二进制框架模糊时，完全不受你控制的代码使用mic
这一事实。谢谢。

UPD05042017: it is still bothersome that once you proxy mic access into some 3rd party framework via some half baked NSMicrophoneUsageDescription you have zero control on where and when it can be used if user agrees to allow mic access. Folks, please do due diligence and craft precise NSMicrophoneUsageDescription that reflects on the fact that the mic is used by the code that's completely outside of your control when the usage is obscured by a 3rd party binary-only framework. Thanks.