Swift version embedded in external Framework

Question

A third part company has provide me a Framework. I would like to check the swift version embedded in the framework (2.2, 2.3 or 3.x) The framework directory include libswift dylib files.

How to check the swift version used in the framework ?

Thanks !

Answer 1

I used the -Swift.h Header file.

$ cat FrameworkName.framework/Headers/FrameworkName-Swift.h

First line is the information you need:

// Generated by Apple Swift version 5.1 (swiftlang-1100.0.270.13 clang-1100.0.33.7)

Answer 2

You can use otool to print all versions of included binaries in the framework:

otool -l /path/to/your/FrameworkName.framework/Versions/A/FrameworkName

Answer 3

You can use Oskars answer to get the swiftlang version (in your case: 703.0.18).

Now you just have to lookup for the Swift version in the following table:

Swiftlang version            Swift version
-                            -
swiftlang-602.0.49.3         1.2
swiftlang-602.0.49.6         1.2
swiftlang-602.0.53.1         1.2
swiftlang-700.0.59           2.0
swiftlang-700.1.101.6        2.1
swiftlang-700.1.101.15       2.1.1
swiftlang-703.0.18.1         2.2
swiftlang-703.0.18.8         2.2
swiftlang-800.0.46.2         3.0
swiftlang-800.0.58.6         3.0.1
swiftlang-800.0.63           3.0.2
swiftlang-802.0.48           3.1
swiftlang-802.0.51           3.1
swiftlang-802.0.53           3.1

Source: Wikipedia

So 703.0.18 means Swift version 2.2.