15

I am programming with Swift in Xcode (MacBook Air 2015) and I want to change my Swift version from 5 to 4. How to do that?

surftijmen
  • 743
  • 1
  • 10
  • 27
  • 1
    Perhaps this answer in the Apple exchange will help: https://apple.stackexchange.com/questions/181472/is-it-possible-to-select-which-version-of-swift-to-use-in-xcode – blurfus Jul 04 '19 at 21:00
  • 5
    See [How do I see which version of Swift I'm using](https://stackoverflow.com/questions/30790188/how-do-i-see-which-version-of-swift-im-using) – rmaddy Jul 04 '19 at 21:20
  • 2
    @rmaddy thanks man, that worked! – surftijmen Jul 04 '19 at 22:07

2 Answers2

23

Project ► (Select Your Project Target) ► Build Settings ► (Type
'swift_version' in the Search bar) Swift Compiler Language ► Swift
Language Version ► Click on Language list

Here you can change your version.

An example screenshot

surftijmen
  • 743
  • 1
  • 10
  • 27
0

For SPMs you can do as follows:

let package = Package(
    name: "Foo",
    products: [
        .library(
            name: "Foo",
            targets: ["Foo"])
    ],
    dependencies: [
    ],
    targets: [
        .target(
            name: "Foo",
            dependencies: [])
    ],
    swiftLanguageVersions: [.version("5.7"))]
)

swiftLanguageVersions is the version of the Swift language to use for compiling Swift sources in the package. The value is passed as-is to the Swift compiler's -swift-version flag.

Kwnstantinos Nikoloutsos
  • 1,832
  • 4
  • 18
  • 34