This document discusses dependency management in Xcode 11. It introduces Swift Package Manager for managing open-source dependencies, binary frameworks (.xcframework) for distributing closed-source multi-platform code, and how to integrate Swift packages and binary frameworks into an Xcode project. Key points covered include defining a package using a Package.swift manifest, publishing packages to version control, and the current state of binary distribution support in Swift Package Manager and other dependency managers.

1. Dependency management in Xcode 11
Boris Bielik
@h3sperian

2. Dependency management in Xcode 11
• Swift Package
• .xcframework
• Recap

3. Swift Package Manager

4. Swift Package Manager
https://swift.org/package-manager/

5. Swift Package
•Open-source code only
•Platform independent
•Can be sourced locally or remotely (Github, Bitbucket, Gitlab)
•Output: Library or executable

6. Swift Package
• Package is defined by Package.swift manifest
• Contains source files, tests, README
• No build phases
• Currently cannot contain assets / bundles

7. Swift PM
Bundle and Resources
https://forums.swift.org/t/swift-pm-bundles-and-resources/13981/26

8. Package.swift Manifest

9. Publishing Swift Package
•tag based release in Github/Gitlab/Bitbucket
•follows semantic versioning - semver.org
•handle platform specific code with #if canImport()
compiler directive
•use @available() to handle platform specific versions

10. Integration of Swift Package

11. Swift Package Integration in Xcode 11

12. Choose Swift Package

13. Choose Swift Package version

14. Choose Your Target(s)

15. Swift Package Dependency

16. μFrameworks

17. Editing packages

19. Binary frameworks

20. Current state
fat framework framework Strip frameworkIntegrator
x

21. Binary frameworks
.xcframework

22. Binary framework

23. Multi-platform support
iOS macOs
tvOS
watchOS
iPadOS

24. Integration in Xcode 11
.xcframework
Integrator

25. How to create
binary frameworks
1. Build libraries for distribution
BUILD_LIBRARY_FOR_DISTRIBUTION=YES
2. Don’t skip installing the module
SKIP_INSTALL=NO

26. How to create
binary frameworks

27. How to create
binary frameworks

28. How to create
binary frameworks

29. How to create
binary frameworks

30. Binary framework

31. ABI Stability
since Swift 5.0
https://swift.org/blog/abi-stability-and-more/
“ABI stability is about mixing versions of Swift at run time”

32. Module Stability
since Swift 5.1
“Module stability is about mixing versions of Swift at compile time.”
Boris Bielik

33. Swift Module Interface

34. Swift Module Interface

35. Binary Distribution in Swift
Package Manager
• Currently not supported in Swift Package Manager
• Discussion thread: https://forums.swift.org/t/spm-support-for-binaries-
distribution/25549/19

36. Carthage supports .xcframeworks
https://github.com/Carthage/Carthage/pull/2801

37. CocoaPods?
https://github.com/CocoaPods/CocoaPods/issues/8892

38. What’s the difference
open-source
platform independent
closed-source
requires Xcode
Swift Package .xcframework

39. Dependency management in
Xcode 11

40. Dependency management in
Xcode 11

41. Dependency management in
Xcode 11

42. Dependency management in
Xcode 11
= =

43. Recap
•Xcode 11 brings native dependency management
•Swift Packages are first class citizens in Xcode IDE
•.xcframeworks are bundling multi-platform close-
sourced binaries
•3rd party dependency managers are still necessary

44. Sample project

45. Trailer

46. thanks.

47. Q & A

48. Links & materials
Adopting Swift Packages in Xcode (WWDC 2019)
Creating Swift Packages (WWDC 2019)
Binary frameworks (WWDC 2019)
Swift Package Manager
Thread: Support for binaries distribution
Micro Features Architecture for iOS