ZegoAVEngineDelegate Protocol Reference Conforms to NSObject Declared in ZegoAudioRoomApi.h – onAVEngineStart required method 音视频引擎启动时回调 - (void)onAVEngineStart Declared In ZegoAudioRoomApi.h – onAVEngineStop required method 音视频引擎停止时回调 - (void)onAVEngineStop Declared In ZegoAudioRoomApi.h