Build your own native-UI library

The course that finishes the job

In the LiDAR course you built an Expo native view by wrapping a UIKit view (ExpoView hosting an ARSCNView) and pointing it at a sensor. That taught the foundation @expo/ui stands on — but it stopped one floor short of @expo/ui itself.

@expo/ui does something the sensor course didn't: the view you register is a SwiftUI (or Jetpack Compose) view, and it renders React children as native children. That's what makes <Host><Button/><Slider/></Host> compose real native controls. This course rebuilds that pattern from scratch — a mini @expo/ui: a Host, a Button, a Slider, a Picker/Switch, and a ContextMenu, on both platforms.

In an interview, say: "@expo/ui renders real SwiftUI and Jetpack Compose from React. Each control is an Expo Module view that conforms to ExpoSwiftUI.View (or the Compose equivalent) and renders its React children natively via Children(). I rebuilt that pattern to understand it end to end."