How to fix “SWIFT_VERSION '3.0' is unsuppo

Question

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')"

Answer 1

For Xcode 10.1, select your Pods File

-> Go to Build Settings -> Choose your Pod -> Search "Swift" -> Navigate to "Swift Language version" -> Set to desired language version.

Answer 2

1. Select project
2. Select Build SettingTab
3. Select Swift Compiler language Option

Answer 3

I came across this issue while developing a Cocoapod. I had an old .swift-version file in my repo that specified Swift 3.0.

Running pod lib lint --verbose led me to this helpful response:

Please remove the .swift-version file which is now deprecated and only use the swift_version attribute within your podspec.

I deleted the file and added spec.swift_version = '5.0' to my podspec file to fix the problem.

Answer 4

select pod like as per image and change swift language version this can save you one day

Answer 5

I followed the instructions on this page and the error didn't resolve. Finally, went into

$ vim MyProject.xcodeproj/project.pbxproj

and found two instances where

SWIFT_VERSION = 3.0;

was still being referenced. I changed those to 5.0 and the error was gone. Not sure why those two were still there.

Answer 6

******** Easiest way: **********

1.Click on PODs in the left column.

2.In the centre column select the pod you want, then navigate to "build settings" in the top right panel.

3.Then search "Swift Language Version" and change to a known version.