ios播放音频如何后台也播放?

info。list添加画中画似乎没用,onEnterBackground

void AudioEngine::onEnterBackground() {
auto itEnd = sAudioIDInfoMap.end();
for (auto it = sAudioIDInfoMap.begin(); it != itEnd; ++it) {
if (it->second.state == AudioState::PLAYING) {
// sAudioEngineImpl->pause(it->first);
// it->second.state = AudioState::PAUSED;
// sBreakAudioID.push_back(it->first);
}
}

#if CC_PLATFORM == CC_PLATFORM_ANDROID || CC_PLATFORM == CC_PLATFORM_OPENHARMONY
// if (sAudioEngineImpl) {
// sAudioEngineImpl->onPause();
// }
#endif
}

这里注释了好像也不好使