Cannot preview in this file - active scheme does not build this file : SwiftUI on Xcode 11 in CatalinaOS
I opened Landmark App using SwiftUI on Xcode 11 in macOS Catalina(10.15) and while opening the Canvas Editor for .swift files containing SwiftUI is showing
Cannot preview in this file - active scheme does not build this file
Try Again, Diagonistics option or restarting Xcode not solving the problem.
Solution
Select the Scheme that has the current file to Preview
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