Module compiled with swift 3.0 cannot be imported in Swift 3.0.1

Question

I upgraded Xcode to 8.1 GM and am now getting the below error for SwiftyJSON. Other imported frameworks seem to work. Is there a way to force this to work in Swift 3 until S

Answer 1

Remove the app chache from DerivedData, and rebuild. the error may be fixed.

The DerivedData path like this:

~/Library/Developer/Xcode/DerivedData/

Answer 2

Just to give the latest updates:

Carthage has released version 0.20 on Feb 27, 2017.

Carthage now only uses the pre-build binary if available pre-build binary is compatible.

That is being said, you no longer have to use: --no-use-binaries to avoid incompatible pre-build framework.

So make sure that you have carthage version greater than 0.20 and simply do:

carthage update --platform iOS

Answer 3

SwiftyJson is being downloaded precompiled by carthage. The precompiled download is with Swift Version 3.0. That makes the compiler complain that the version is not correct. Using the following command:

carthage update --platform iOS --no-use-binaries

SwiftyJson (and all other frameworks within Carthage) will be compiled locally using the local version of Swift (3.0.1) and the compiler will not complain anymore.

Answer 4

Just like @zirinisp said:

1. You can Using the following command:carthage update --platform iOS --no-use-binaries
2. Using the following command:xcrun swift -version to see the Swift version
3. Do this: Xcode->preferences->locations to clear the derived data and archives data, the most important to change the command line tools to "Xcode 8.1"
4. Using the following command:xcrun swift -version,you can see the swift version is 3.0.1
5. Set Use Legacy Swift Language Version = NO

I hope it will help you

Answer 5

In Xcode Build Settings make sure your Framework Search Paths contain the appropriate Carthage Build folder:

$(inherited)
$(PROJECT_DIR)/Carthage/Build/iOS

Answer 6

Updating default Xcode to new one on terminal worked for me.

Step 1 : Use following command to update Xcode version to latest on Terminal. Ref

sudo xcode-select -switch <path/to/>Xcode.app

Step 2 : Now try carthage update command

carthage update --platform iOS