我已经发现了适用于音频的解决方案，我没有尝试过的视频

I have found a solution which works for audio, I have not tried video

如果您更新后台模式，在该项目的功能设置，包括音频。这将允许出口。

If you update your "Background Modes" setting in the capabilities of the project to include Audio. It will allow the export.

这是为在后台播放音乐。

This is intended for playing music in the background.

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这也适用于视频