https://medium.freecodecamp.org/how-to-run-a-react-native-app-on-ios-fc427be3c375

I recently started to develop a React-Native app on iOS. This was my first foray into native app development. I was surprised by the ease and level of abstraction provided by React-Native’s command line interface. I was also curious to understand what happens under the hood when React-Native runs an app on a device or a simulator.

I spent a lot of time going through the relevant code. There was no one place which summarized what React-Native does to get the app working. Partly, that was the motivation to come up with this piece. I want to help any other person who is starting off afresh with React-Native app development.