How can I switch to Swift 4.0 in Xcode 9.3?
Question
It seems like I have only options to go to 3.3, or unspecified:
Can I switch to 4.0 somehow?
2 answers
solution1
1 ACCPTED 2018-04-05 09:46:48
Make sure you have updated xCode then under Build Settings, check the drop down options for Swift Compiler - Language.
Furthermore, You can download Xcode 8.x and 9.x from Apple Download Portal , if you've premium developer account (apple id). You can install & work with both Xcode 9 and Xcode 8.x in single (mac) system. (Make sure you've Command Line Tools supporting both version of Xcode, to work with terminal)
solution2
0 2018-10-24 14:26:54
I was able to install swift 4.0 in XCode 10 with solution from here "Switching Swift Versions inside Xcode using Toolchains" .
But in the end this did not help . I stuck on error:
< unknown>:0: error: unknown argument: '-enable-batch-mode'
Even disabling not helped. I got:
< unknown>:0: error: unknown argument: '-disable-batch-mode'
"Switching Swift Versions inside Xcode using Toolchains" shortly:
- Download desired toolchain , and click to install.
- Select new toolchain in XCode Preferences.
- Select here:
- Result here:
- Select here:
- Use desired swift, beware caveats.
Another related: material .
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