我需要更改发布商的视频质量。我遇到了从ObjectiveC到Swift3.0的转换问题。这是我的ObjectiveC代码:OTPublisherSettings*settings=[[OTPublisherSettingsalloc]init];settings.name=@"Bob'svideo";settings.audioTrack=NO;settings.videoTrack=YES;settings.cameraResolution=OTCameraCaptureResolutionHigh;settings.cameraFrameRate=OTCameraCaptureFr