Module compiled with Swift 4.0 cannot be imported in Swift 4.0.1

by

Update:

For release versions of Xcode:

This error (and similar errors involving Swift 4.1, 4.2, etc.) will occur when opening a project with Xcode 9.1, 9.2, 9.3, 9.4, 10, etc. that uses frameworks that were built with earlier Xcode tools.

To fix the issue, update and rebuild your frameworks using Carthage ( carthage update --platform iOS), Cocoapods (pod update or pod install), or manually, with the new updated Xcode tools. The tools should be updated automatically when you update Xcode, but if not, you can follow the steps outlined below in the original answer.

You may also need to clean your project cmd + shift + k and possibly your build folder cmd + option + shift + k to get Xcode to not use cached framework builds.

In some cases you may also need to delete your derived data folder (Easily found by going to Xcode Preferences -> Locations -> Derived Data Folder
(Thanks Stunner)

For beta versions of Xcode:

See original answer below and then follow steps above.

Original Answer:

You probably still have your xcodebuild tools set to Xcode 9.0 which builds with Swift 4.0 and is incompatible with Xcode 9.1 beta’s Swift 4.0.1.

Check in the terminal using the command:

xcodebuild -version

Or just go into Xcode preferences -> Locations and check/change the command line tools to Xcode 9.1. You should be set then.

More Related Contents:

  1. Swift 4 “This class is not key value coding compliant”
  2. Xcode 9 Swift Language Version (SWIFT_VERSION)
  3. Xcode 9 – failed to emit precompiled header [duplicate]
  4. How to move to another page directly without click a button in Swift
  5. Delete the story board and this error show in all project
  6. Swift saving and retrieving custom object from UserDefaults
  7. AnyObject not working in Xcode8 beta6?
  8. How do you perform wireless debugging in Xcode 9 with iOS 11, Apple TV 4K, etc?
  9. How to create radio buttons and checkbox in swift (iOS)?
  10. How to increase the height of navigation bar in Xcode?
  11. Xcode 7.3: import Module displayed with strikethrough
  12. Connect Objective-C framework to Swift iOS 8 app (Parse framework)
  13. Xcode beta 6 iOS 8: Simulator not working
  14. Swift default AlertViewController breaking constraints
  15. How to debug an iOS extension (.appex)?
  16. Passing parameters to a method called by NSTimer in Swift
  17. How to keep a round imageView round using auto layout?
  18. navigation bar rightbaritem image-button bug iOS 11
  19. Changing text of UIButton programmatically swift
  20. How to change UIButton image in Swift
  21. Swift ios check if remote push notifications are enabled in ios9 and ios10
  22. UIApplication.registerForRemoteNotifications() must be called from main thread only
  23. After switching to Xcode 7, app size grew from 9 MB to 60 MB, is there a fix?
  24. Swift performSegueWithIdentifier not working
  25. Xcode Version 6.1 (6A1030) – Apple Mach O-Linker Error – Building
  26. Could not insert new outlet connection: Could not find any information for the class named
  27. The app delegate must implement the window property if it wants to use a main storyboard file swift
  28. iOS app testing. App installation failed. No code signature found [closed]
  29. Set UITableView’s height to the height of its content with Auto Layout
  30. SwiftUI tappable subtext

Leave a Comment