I'm using Xcode 10.1 under macOS 10.13.6. I created a new project from the iOS Master-Detail template. Without changing anything in the new project, I build and run against the new iPad Pro 11" simulator. Same for the new iPad Pro 12.9" 3rd gen.
The app is not quite full screen. The status bar is above the top of the app, not in the top of the navbar as expected. The bottom of the app doesn't go all the way to the bottom of the screen. It stops just above that thin bar near the bottom of the screen.
This same app run on any of the iPhone X series simulators is completely full screen as expected.
What extra steps are required to make an app appear in complete full screen on an iPad Pro 11"? Again, I'm using an unmodified new project from the Master-Detail template.
The next issue is setting UIRequiresFullScreen to YES. Doing this results in vertical black bars down the left and right sides of the iPad Pro 11" screen when turned to landscape and smaller horizontal black bars at the top and bottom sides when in portrait. In other words, the app is letterboxed. Why? The letterboxing is also on the new 12.9" iPad but not as large.
What extra steps are required to allow an app that requires full screen to actually be full screen and not letterboxed?
Perhaps the answer to both of these issues is the same.