如何使用Swift 2.3而不是Xcode 8中的Swift 3来构建项目？

Question

I recently updated my Xcode and because of this I can't build my app. I googled a couple of solutions and found out that I need to install a toolchain to use Swift 2.3 instead of Swift 3 . And to install a toolchain, I need to use Carthage .

Source:

However, I am using CocoaPods for my dependencies and I can't commit to a change now. So my question is:

1. Can I install the toolchain without Carthage ? If so how?
2. Can I use them both ?
3. Is there any other way?

Thanks in advance.

EDIT:

Tried setting "Use Legacy Swift Language Version." to "No". However my other frameworks (ie Alamofire ) started to show following error:

“Use Legacy Swift Language Version” (SWIFT_VERSION) is required to be configured correctly for targets which use Swift. Use the [Edit > Convert > To Current Swift Syntax…] menu to choose a Swift version or use the Build Settings editor to configure the build setting directly.

Answer 1

Your project is in Swift 2.2, not Swift 2.3. When you go to the convert menu, you'll have the option of a choosing between Swift 2.3 and Swift 3. Pick Swift 2.3 and run the conversion.