How to hidden naviagation bar
Hi ma0qian0, thanks for using our SDK. Yes, the navigation bar can be hid. There is a value that control the hide/show of this area: MobileRTCMeetingSeetings.topBarHidden.
If you have a chance to download our demo app in Github repo, in MeetingSettingsViewController.m, there is a function called topBarHiddenCell, you can find the way to implement this part.
Let me know if you have any other questions. Thanks! 