I used ChatGPT recently to develop an iOS app (I'm an iOS dev, but I wasn't proficient with SwiftUI at the time). ChatGPT astounded me. When I copied something that didn't work, I could tell it "hey I get this error" and it would reply with the necessary changes. I was able to get an MVP together this way. I learn by doing and I learnt much more quickly using this method than reading guides/watching YouTube/reading docs. Until that point I didn't fully get the AI craze.
Current cutoff date is Jan 2022. That's iOS 15 out for a couple of months which is good enough for most things in my experience. If your deployment target really already is iOS 16, the gaps can be filled with the documentation and other sources.
This was about 6 months ago and I had no issues that it wasn't able to solve. It might not know about the latest features, but I don't think that matters unless you're building something cutting edge. It'll try to show you how to build what you want using the features set it's familiar with. It's probably better now with the browse plugin too.
