[tmp_anon_22]

iOS development sucks. It had a huge amount of churn this decade due to the transition into Swift. Documentation wasn't just out of date, it was in a different dimension. Every SO answer was a mix of incompatible versions and - what answers existed were best guesses from people who also had no concrete documentation to go off of.

Your best bet was to cozy up to Apple teams or preferred Apple partners like Facebook and Uber, and see if the inside scoop could save you a few months of maddening frustration.

You can see this evidenced in engineering blog posts from companies like Uber and Twitter, they had to hire soooo many people to build out their mobile app.