In the readme file (https://github.com/sassoftware/sas-sdk-for-iOS-examples/blob/master/README.md) There is a note that says the following:
"NOTE: Because Swift does not yet have ABI compatibility, we are required to package the swift runtime with the built framework. This means that consumers of the framework must compile apps that use the framework with the same swift version as was used for compiling the framework. For release 8.22, the framework was built with Xcode 9.2 (9C40b)."