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Chapter 10. Why? Can't see the execution screen?

It doesn’t appear like page 256.

The screen doesn’t appear on the iPad.
When I run my project, it doesn’t appear, so it’s the same if I run the project in final.
Here is the version information for my macOS and Xcode.
Is macOS version beta and affected?

It’s a bit frustrating.
macOS: Catalina, version 10.15.2 beta (19C46a)
XCode: 11.2.1 (11B500)
For more information, please see the captured image of my computer.

thank!

!

hi Hye Gon! currently, for split-view in portrait orientation, you have to swipe in from the leading edge to see the initial view — see page 233, just below the screenshot. Or rotate to landscape.