Agora RTC Objective-C API Reference Refactor

### - u -

- unloadSrc() : IMediaPlayerSource
- unloadSrc: : <AgoraRtcMediaPlayerProtocol>
- unmuteRemoteFromTimestamp() : IRemoteAudioTrack
- unpublish : AgoraLivePublisher
- unpublishAudio() : ILocalUser , IRtmpLocalUser
- unpublishDataChannel() : ILocalUser
- unpublishVideo() : ILocalUser , IRtmpLocalUser
- unregisterAudioEncodedFrameReceiver() : IRemoteAudioTrack
- unregisterAudioFrameObserver() : ILocalUser , IMediaPlayerSource , IRecordingDeviceSource , IRtmpLocalUser
- unregisterAudioSpectrumDelegate: : AgoraRtcEngineKit
- unregisterAudioSpectrumObserver() : ILocalUser , IRtcEngine
- unregisterCameraObserver() : ICameraCapturer
- unregisterDataChannelObserver() : ILocalUser
- unregisterEventHandler() : IMediaRelayService , IRtcEngine
- unregisterLocalUserObserver() : ILocalUser
- unregisterLocalVideoEncodedFrameObserver() : ILocalUser
- unregisterMediaControlPacketReceiver() : ILocalUser
- unregisterMediaMetadataObserver() : IRtcEngine
- unregisterMediaPacketReceiver() : IRemoteAudioTrack , IRemoteVideoTrack
- unregisterMediaPlayerAudioSpectrumDelegate: : <AgoraRtcMediaPlayerProtocol>
- unregisterNetworkObserver() : IRtcConnection
- unregisterObserver() : IMediaStreamingSource , INGAudioDeviceManager , IRtcConnection , IRtmpConnection , IRtmpStreamingService , IRtmService
- unregisterPlayerSourceObserver() : IMediaPlayerSource
- unregisterRtmpUserObserver() : IRtmpLocalUser
- unregisterTrackObserver() : ILocalAudioTrack
- unregisterTranscoderDelegate: : <AgoraH265TranscoderProtocol>
- unregisterTranscoderObserver() : IH265Transcoder
- unregisterVideoEncodedFrameObserver() : ILocalUser , IRemoteVideoTrack
- unregisterVideoFrameObserver() : ILocalUser , IRtmpLocalUser
- unsetView() : IVideoRenderer
- unsubscribeAllAudio() : ILocalUser
- unsubscribeAllVideo() : ILocalUser
- unsubscribeAudio() : ILocalUser
- unsubscribeDataChannel() : ILocalUser
- unsubscribeToHostUid: : AgoraLiveSubscriber
- unsubscribeTopic:withOption: : AgoraRtmStreamChannel
- unsubscribeVideo() : ILocalUser
- updateAttributes() : IChannel
- updateCaptureRegion() : IScreenCaptureSource
- updateChannelExWithMediaOptions:connection: : AgoraRtcEngineKit , AgoraRtcEngineKit(Ex)
- updateChannelMediaOptions() : IRtcEngine
- updateChannelMediaOptionsEx() : IRtcEngineEx
- updateChannelMediaRelay() : IRtcEngine
- updateChannelMediaRelay: : AgoraRtcEngineKit
- updateChannelMediaRelayEx() : IRtcEngineEx
- updateChannelMediaRelayEx:connection: : AgoraRtcEngineKit , AgoraRtcEngineKit(Ex)
- updateChannelWithMediaOptions: : AgoraRtcEngineKit
- updateDirectCdnStreamingMediaOptions() : IRtcEngine
- updateDirectCdnStreamingMediaOptions: : AgoraRtcEngineKit
- updateLocalTranscoderConfiguration() : IRtcEngine
- updateLocalTranscoderConfiguration: : AgoraRtcEngineKit
- updateLoopbackAudioTrackConfig() : IMediaEngine
- updatePlayerPositionInfo:positionInfo: : AgoraBaseSpatialAudioKit
- updatePreloadChannelToken() : IRtcEngine
- updatePreloadChannelToken: : AgoraRtcEngineKit
- updateRemotePosition:positionInfo: : AgoraLocalSpatialAudioKit
- updateRemotePositionEx:positionInfo:connection: : AgoraLocalSpatialAudioKit
- updateRtmpTranscoding() : IRtcEngine , IRtmpStreamingService
- updateRtmpTranscoding: : AgoraRtcEngineKit
- updateRtmpTranscodingEx() : IRtcEngineEx
- updateRtmpTranscodingEx:connection: : AgoraRtcEngineKit , AgoraRtcEngineKit(Ex)
- updateScreenCapture: : AgoraRtcEngineKit
- updateScreenCaptureRegion() : IScreenCapturer2 , IScreenCapturer
- updateSelfPosition:axisForward:axisRight:axisUp: : AgoraBaseSpatialAudioKit
- updateSelfPositionEx:axisForward:axisRight:axisUp:connection: : AgoraBaseSpatialAudioKit
- UplinkNetworkInfo() : UplinkNetworkInfo
- uploadLogFile : AgoraRtcEngineKit , IRtcEngine
- UserAudioSpectrumInfo() : UserAudioSpectrumInfo
- UserId() : IRemoteDataChannel
- UserInfo() : UserInfo