How can I choose Swift compiler version

Question

I\'m using Xcode 7.3 but my project is in Swift 2.1. I don\'t want to update my codes right now. So how can I choose or download older version of Swift compiler? Many thanks

Answer 1

If you're following the answers involving a .xctoolchain combined with Xcode 9 beta you'll encounter an error similar to this: :0: error: unknown argument: '-index-store-path' Command /Library/Developer/Toolchains/swift-3.1.1-RELEASE.xctoolchai‌​n/usr/bin/swiftc failed with exit code 1

The reason is that Apple has added a new feature/argument, which hasn't made its way to open source Swift yet. You can get around this issue by launching Xcode from the command line with the feature disabled like this: /path/to/Xcode-beta.app/Contents/MacOS/Xcode -IDEIndexEnableBoltIndex NO

Thanks to the Swift team