How do I check if code is running in an XCode Preview in Swift?

How to check if code is running in an XCode Preview in Swift

Two flowers that represents SwiftUI and XCode side by side with the text “Is XCode Preview” beneath it.

Code is running in an XCode preview if the process info environment variable "XCODE_RUNNING_FOR_PREVIEWS" is set to "1".

A screenshot of XCode showing utility we created to determine if the code is running in an XCode preview.

The code demonstrated above can be found in the Utils/System folder of our open source starter projects linked below.

To use it, simply write isXCodePreview() in your app.

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How to check if code is running in an XCode Preview in Swift

Code is running in an XCode preview if the process info environment variable "XCODE_RUNNING_FOR_PREVIEWS" is set to "1".

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