近日提交TODOT的新版本时被2.1拒绝了，原因如下：
Guideline 2.1 – Information Needed
We’re looking forward to completing the review of your app, but we need more information to continue.
Next Steps
Please provide detailed answers to the following questions in your reply to this message in Resolution Center:
– What is the purpose of declaring Audio background mode? Please explain the need for this background mode and where the usage can be found in your binary.
Since your App Store Connect status is Metadata Rejected, we do NOT require a new binary. To revise the metadata, visit App Store Connect to select your app and revise the desired metadata values. Once you’ve completed all changes, reply to this message in Resolution Center and we will continue the review.
大致意思是我开启了后台模式，用来播放音乐，但审核人员未找到这些功能。回复信息，说明那个功能用到后台模式即可。