Tell Carthage to build dependency using Swift 3.2.2 (NOT Swift 4.0)
You say:
- your project is compiling in Swift 3.2.2
- your dependency, once resolved and downloaded with Carthage, will be compiling in Swift 4 (since its Build Setting was configured in that way)
with those conditions will be impossible for you resolving the issue: you can't mix Swift 3 and 4 due to this:https://github.com/Carthage/Carthage/issues/1978
The only thing you can do, for (eventually) fixing the situation is:
Scenario 1
- you should find a previous version of the library which is building in Swift 3.2~, if exists
on your Cartfile you specify that specific version, eg:
github "yourDependency" == x.y.z
Scenario 2
- launch
carthage update --platform iOS - enter inside your dependency folder (
Carthage/Checkouts/yourDependency) and open the .xcodeproj in order to modify manually this option:
- then you might have tons of building problems due to the fact that you are producing a language regression, you can try to fix them (depending by the library if is small or not, it could be possible).
if you have solved the dependencies, then launch:
carthage build --platform iOS- try to compile your project...