update document

README.md

@@ -1,17 +1,39 @@
-# ChuckNorrisViewer
-- ChuckNorrisViewer (ReactNative + Redux + RxJs)
-- A sample code of React Native - Native Hybrid application
+- A sample implementation of React Native - Native Hybrid application using ReactNative + Redux + RxJs
+- This application opens React Native screen from Native platform, fetch a list of Chuck Norris Fact on React Native, and return selected value to Native platform. 
 
+### Android
 ![img](./img/img1.png)
 
+### iOS
+![img2](./img/img2.png)
+
 # Note
-- master branch is a very basic implementation of the hybrid application. If you would like to see a real world code, switch a branch to 'react_service_architecture'. This branch showcases a practical hybrid application using Dagger2 for DI and RxJava2 for creating Observer Pattern. 　
-- Currently this hybrid application only works for Android version. iOS version will come in shortly.
+### Android
+- master branch is a very basic implementation of the hybrid application on Android.
+- If you would like to see a real world code, switch a branch to 'react_service_architecture'. This branch showcases a practical hybrid application using Dagger2 for DI and RxJava2 for creating Observer Pattern. 　
+
+### iOS
+- master branch is a very basic implementation of the hybrid application on iOS.
+- You might want to use RxSwift or other Reactive programming library to implement Observer Pattern.
 
 # Setup and run
 
+### React Native
+
 ```
 npm install
-react-native run-ios
-react-native run-android (Launch emulator beforehand)
+react-native start
 ```
+
+### Android
+- Open Android Studio from `android/build.gradle`, and start the application from "Run" button
+
+### iOS
+- Run command below:
+
+```
+pod install
+```
+
+- Open `ios2/chuckNorrisViewer2.xcworkspace`
+- Build and start the app