Forgive me if this is a dumb quesiton, but is it possible to run an app and its my framework compile on run through Xcode 8 (targeting iOS 9) on iOS 10?
I am trying to be pro-active in responding the developers using my framework. I want to see what kind of errors app developers using my framework would run into, if they did not upgrade to my iOS 10/Xcode9-compatible framework update.
Xcode allows a range of iOS support (based on the iOS SDK it ships with), by setting the Deployment Target accordingly (allowing say iOS 10.x and 9.x in your example), so the general answer to your query is yes.
Your framework would require coding/testing as usual to confirm either way.