Module compiled with Swift 2.3 cannot be imported in Swift 3.0

Question

i add Facebook SDK (Swift) to my project. And now i update Xcode 8 and Swift 3. I have error in build time

Module compiled with Swift 2.3 cannot be imported in Swift 3.0 

It is very strange that is not supported. Has anyone had similar problems?

Answer 1

Remember to set Use Legacy Swift Language Version to YES for your project target

You are building your project in 2.3 and not in 3.0

Answer 2

Have in mind that if you want to use Swift 3 as your main project's language you have to use pods that are either Swift 3, or Swift 2.2-. If you try to use a Swift 2.3 project, they will not compile (as in the error you describe).

So the best thing to do is to use either Swift 3 pods, or Swift 2 (2.1 or 2.2) pods and select Use Legacy SLV for that specific pod (in 'Pods' build setting for the specific target you want to use).