I´m trying to get the new Canvas feature from Xcode 11 running, but the Canvas won´t show up. What am I doing wrong?
This new Xcode feature should show a live preview of my SwiftUI views without running the app.
When you create a custom View with SwiftUI, Xcode can display a preview of the view’s content that stays up to date as you make changes to the view’s code. You define a structure that conforms to the PreviewProvider protocol to tell Xcode what to display. Xcode shows the preview in a canvas beside your code.
https://developer.apple.com/documentation/swiftui/previews-in-xcode
I just created a new default project (single view app), compiled it and activated 'Editor > Editor and Canvas'. I can navigate to each file in the project, nothing shows up.
What else does need to be done?
You need to be on Catalina macOS version (10.15), as stated in official tutorial
Be warned: Catalina doesn't support 32-bit applications, some old apps will stop working after update.