If you run your app in simulator, and the iOS keyboard does not display on input fields, do not be alarmed (like I was!).
You’ve probably just turned the on-screen keyboard off by accident. There is a menu option Hardware > Keyboard > Connect Hardware Keyboard which does this. It is to simulate iOS when an external keyboard is connected.
Here’s what the app looks like:
That’s the default ‘sidebar’ template app, with the keyboard accessory bar turned on just to show that the app is in input mode.
This tripped me up for a bit, so just sharing here in case someone else does the same.