What native basics does an RN developer need?
You can build a lot in React Native without touching native code, but eventually a build error, a native crash, or a library setup forces you into the iOS or Android project. Enough Swift and Kotlin to read code, follow setup docs, and debug the native layer is the goal — not full native fluency.
Why it matters
The RN developers who never get blocked are the ones comfortable opening Xcode or Android Studio when needed. A cryptic native build error or a crash log pointing into native code stops everyone else cold. This knowledge turns a hard wall into a speed bump.
What to learn
- The iOS project structure and Xcode basics
- The Android project structure and Gradle basics
- Reading Swift and Kotlin well enough to follow
- Native build errors and where to look
- Reading a native crash log
- Configuring native dependencies (CocoaPods, Gradle)
- When to ask for native help versus push through
Common pitfall
Panicking at the first native build error and assuming the whole approach is broken. Most are mundane — a missing pod install, a Gradle version, a config line in the wrong place. Learning to read the native error and the project structure turns these from blockers into quick fixes you handle yourself.
Resources
Primary (free):
- Apple — Swift documentation · docs
- Android — Kotlin basics · docs
- React Native — Native code & build · docs
Practice
Open the iOS and Android native projects of an RN app in Xcode and Android Studio. Locate where native dependencies are configured, run a build, and deliberately introduce then fix a small native config error. Done when a native build error no longer stops you cold.
Outcomes
- Navigate the iOS and Android native projects.
- Read Swift and Kotlin well enough to debug.
- Diagnose common native build errors.
- Read a native crash log to locate a problem.