Build ios-framework fails, swift version attribute required

[safarri]

build ios-framework fails with the error:

" [!] Unable to determine Swift version for the following pods:

- `apple_maps_flutter` does not specify a Swift version and none of the targets (`Runner`) integrating it have the `SWIFT_VERSION` attribute set. Please contact the author or set
the `SWIFT_VERSION` attribute in at least one of the targets that integrate this pod.

/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/xcode/target_validator.rb:125:in `verify_swift_pods_swift_version'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/xcode/target_validator.rb:39:in `validate!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:590:in `validate_targets'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:158:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'

"

[alexshikov]

This is still an issue for us.

[LuisThein]

I'm not able to reproduce this issue. Did you create your Flutter Project using Objective C?

I found this issue can you please let me know if this fixes your issue?

[alexshikov]

The problem is: we have to make a fresh build of embedded flutter library every time.

So we do:

flutter clean
flutter build ios-framework

What actually helped is to add a ENV['SWIFT_VERSION'] = '5' to the .ios/Podfile but as you probably know, that file is going to be purged with every flutter clean.

You can find a simple project with reproduce of the error here: https://github.com/alexshikov/flutter-map-example

Just follow the steps from the README.

[alexshikov]

@LuisThein maybe simply adding a SWIFT version to the podspec should fix the problem. Another plugin that we use works great: https://github.com/juliuscanute/qr_code_scanner/blob/master/ios/qr_code_scanner.podspec

[LuisThein]

Sorry for taking so long.

Thank you for the example project! Now I finally understand. This issue seems to only happen when trying to build a Flutter module, which I actually never tested... Anyway, this should be fixed in the next release 👍