I've seen an app that activates the lock-screen after showing a local notification (so the user has to enter the passcode).
... and now I wonder how they did this, since I need this kind of functionality for one of my projects. It might even pass Apple's review process because it does make sense for this app... (and, yes, I'm aware that Apple might reject it, but I'd like to give it a shot).
How would I do this???