How to fix "SWIFT_VERSION '3.0' is unsupported, supported versions are: 4.0, 4.2, 5.0" error in Xcode 10.2?

xcode swift3 xcode10.2
vlad uvarov picture vlad uvarov · Mar 26, 2019 · Viewed 90.4k times · Source

I'm trying to run downloaded from app, try to open in Xcode and have an error:

" Showing Recent Messages
:-1: SWIFT_VERSION '3.0' is unsupported, supported versions are: 4.0, 4.2, 5.0. (in target 'SimpleWeather')"

Screenshot added

Answer

Xeneka picture Xeneka · Mar 27, 2019

Select the target 'SimpleWeather' in the project and change language version Target->build setting -> Swift compiler language -> select 5, 4.2 etc

image of build setting for changing compiler language

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