For those of you iOS Swift developers, how long did it take to learn and have a decent app with database functionality, coming from a different programming language background?

About a week 🙂

I haven't. iOS doesn't let you

@kxdan oooh snap

It has less to do with Swift and more with the iOS environment. Learning all its libraries is the hard part actually. Swift itself is pretty quick to get comfortable with.

Also about 2 months or so

Half year tbh..

A week, maybe a bit less. I bought a course on Udemy (look for "Rob Perceival") and made it about 15-20% in by the time I felt comfortable enough to try it on my own. The majority of what I didn't know, I googled for and found quick tutorials online or SO snippets.

Been doing it for a little over 18 months now (since Swift was announced), and still find it just as enjoyable as the first day.

Side note: I'd already had ~7 years experience building web apps, APIs, etc. and had a solid understanding of programming in general, so it's not hard for me to pick up new languages. YMMV.