Supported Language
The Thing-IF SDK supports app development with Swift 2.3 in Xcode 8. You can incorporate the framework which can be built with Swift 2.3 by adding the Thing-IF SDK using CocoaPods. See Adding Thing-IF SDK to learn how to add the SDK.
If you want to use another development environment such as Xcode 7 and Swift 3.0, download the source code of the Thing-IF SDK for iOS and adjust the configuration to make it buildable.