I need to add a custom key to the iOS system keyboard without requiring a jailbreak. For example, when I go into any app, I want my custom key to show up and then have it launch a view from my app.
I’ve seen tons of examples that do things like this from a custom UITextView, but nothing that modifies the keyboard for all apps.
No. Apple has iOS pretty locked down. Your app is pretty much in its own sandbox with a few outlets to the rest of the system.
You also can’t create a custom keyboard like Android.