This question already has an answer here:
When I am running the project in iPhone X is getting black space above navigation bar as shown, not getting the color as same.
How to solve this?
I suppose you are not using storyboard for launch screen.
There are two options to fix this.
- Use storyboard as LaunchScreen.
- If you are using Launch Image Source for launch screen add launch screen image for iPhoneX.
来源：https://stackoverflow.com/questions/46909424/navigation-bar-issue-in-iphone-x