Updated an app to iOS 9 / Swift 2 / watchOS 2 and since then, Xcode claims it can't find my embedded framework when building the watchOS extension. It has no issues finding it for my iOS app and the build settings look ok - the framework is showing as a dependency... but yeah, no dice. Tried cleaning and nuking Derived Data.
Any ideas?
Check the Target Platform of your framework and watchkit extensiosn in their Build Settings.
It seems currently Xcode 7 only lets you choose either iOS or watchOS, but since your framework is shared between platforms you need to manually put all 4 of: watchsimulator, watchos, iphonesimulator, iphoneos
In my case, after fixing the above, I also needed to add armv7k and i386 to Valid Architectures.
Then I finally got to see all the new WatchKit compile errors 🙂