react-native-ratioview v1.0.3
react-native-ratioview 
High performance aspect ratio layout container

Install
npm i react-native-ratioview --savereact-native link react-native-ratioview
Manual install
Android
npm i react-native-ratioview --saveOpen up
android/app/src/main/java/[...]/MainApplication.java Addnew ReactRatioViewPackage()to the list returned by thegetPackages()` methodAppend the following lines to
android/settings.gradle:include ':react-native-ratioview' project(':react-native-ratioview').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-ratioview/android')Insert the following lines inside the dependencies block in
android/app/build.gradle:```compile project(':react-native-ratioview')
```
iOS
http://facebook.github.io/react-native/docs/linking-libraries-ios.html
1. npm i react-native-ratioview --save
2. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
3. Go to node_modules ➜ react-native-ratioview and add RatioView.xcodeproj
4. In XCode, in the project navigator, select your project. Add libRatioView.a to your project's Build Phases ➜ Link Binary With Libraries
5. Click RatioView.xcodeproj in the project navigator and go the Build Settings tab. Make sure 'All' is toggled on (instead of 'Basic'). In the Search Paths section, look for Header Search Paths and make sure it contains $(SRCROOT)/../../react-native/React - mark as recursive.
5. Run your project (Cmd+R)
Usage
<RatioView whRatio={1200 / 630}>
<Image source={{uri: 'https://facebook.github.io/react/img/logo_og.png'}}/>
</RatioView>