iOS审核被拒Guideline 2.5.4 - Performance - Software Requirements

被拒原文：

Your app declares support for audio in the UIBackgroundModes key in your Info.plist, but we were unable to play any audible content when the app was running in the background.

Next Steps

The audio key is intended for use by apps that provide audible content to the user while in the background, such as music player or streaming audio apps. Please revise your app to provide audible content to the user while the app is in the background or remove the "audio" setting from the UIBackgroundModes key.

大致翻译：

您的应用声明在Info.plist中的UIBackgroundModes键中声明对音频的支持，但是当应用在后台运行时，我们无法播放任何可听内容。 

后续步骤

音频密钥旨在供在后台为用户提供可听内容的应用程序使用，例如音乐播放器或流式音频应用程序。 请修改您的应用，以便在应用处于后台时向用户提供可听内容，或从UIBackgroundModes键中删除“音频”设置。

解决办法：如果项目中包含语音输入相关内容的，可以直接回复邮件，详细解释使用音频的位置在哪，具体怎么用；如果项目中没有语音相关的内容，那就直接把plist文件中的Privacy - Microphone Usage Description 去掉，然后再重新打包提交即可