I flowing tutorial about swift UI. But I cannot show the can show the Canvas (I also used the tip
Tip: If the canvas isn’t visible, select Editor > Editor and Canvas to show it. but still cannot show). I used Xcode 11.0 beta on MacOS
SwiftUI is available only on macOS 10.15
Thanks for point it out.
Actually, SwiftUI works with Xcode 11 on macOS 10.14.5, but tools like Canvas won't be available. This is my experience so far.