change splash screen in react-native ios app

1. make image set
  http://ticons.fokkezb.nl/

  ticons splashes image.jpg --output-dir path/to/your/project --alloy --platforms iphone,ipad,android --locale ko

2. add the image set as an asset in xcode
https://medium.com/@jvlobo/change-default-launch-screen-in-react-native-ios-app-544f94f1e947#.5tz28evvz