Have you encountered this error when upgrading to the latest CocoaPods (1.1.0), or sharing a library between your iOS App and your extension?

'sharedApplication' is unavailable: not available on iOS (App Extension) - Use view controller based solutions where appropriate instead.

If yes, continue reading, as you might have encountered same issue as myself. I’ve recently had to upgrade a project to using Cocoapods 1.1.0. Things stopped compiling, and I had to investigate the root cause of the problem. It has to do with iOS App extensions, unavailable APIs and how fragile our tooling is ;).