Xcode 11 beta swift ui preview not showing

To open the preview canvas, just go to Editor -> Canvas

Or do Alt + Command + Enter

If your macOS version is below 10.15, you will get the below error

enter image description here

Update mac and try the same.

To preview and interact with views from the canvas in Xcode, ensure your Mac is running on Catalina MacOS.

https://developer.apple.com/tutorials/swiftui/creating-and-combining-views

Please check apple document in the following URL https://developer.apple.com/documentation/xcode_release_notes/xcode_11_beta_2_release_notes

Xcode 11 beta supports development with SwiftUI.

Note

Tools for SwiftUI development are only available when running on macOS Catalina 10.15 beta.

Maybe someone is looking for this: Editor -> Canvas (Alt + Command + Enter)

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