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

Originally I posted this is a comment, but I should have just posted it as an answer:

If you're writing an app for the App Store, you can only use a release (non-beta) version of Xcode (see “Submitting Apps to the App Store using Xcode”) and the toolchain supplied with that version of Xcode (see “Using Downloads / Apple Platforms”). So you can either use Xcode 7.2 and continue using Swift 2.1, or you can use Xcode 7.3 and update your code to Swift 2.2.

You can have multiple versions of Xcode installed. You can keep Xcode 7.2 installed and use it for your non-updated Swift 2.1 projects, and use Xcode 7.3 on new projects. Note that you'll have to manually open each project in the appropriate version of Xcode. You can download old versions of Xcode here.

If you're not going to put your app in the App Store, then maybe you could extract the Swift 2.1 toolchain from the Xcode 7.2 bundle and turn it into a .xctoolchain for use with Xcode 7.3, but you're really in unexplored, unsupported territory if you go that route.