Is this a bug report?

don't know

Environment

Environment:
OS: macOS Sierra 10.12.6
Node: 8.4.0
Xcode: 9.2

react-native: 0.48.1 => 0.48.1
react: 16.0.0-alpha.12 => 16.0.0-alpha.12

Target Platform: iOS 10 and greater

Steps to Reproduce

in my index.ios.js

`render() {
    StatusBar.setBarStyle('light-content', true);
    StatusBar.setTranslucent(true)
    StatusBar.setHidden(true)
    return (
      <SafeAreaView style={{ flex:1,backgroundColor:BACKGROUND,}}>
        <View style={{flex:1}}>
          <StatusBar hidden={true} />
          <Provider  store={store}>
            <RouterComponent />
          </Provider>
        </View>
      </SafeAreaView>

    );
  } 
)`

My React Native app on iOS 10 starts from under the status bar but in iOS 11 the app starts from below the status bar. I want to start the app from 0x 0y off screen for all versions of iOS and the nav bar under the status bar. In Android there is a function called setTranslucent() but on iOS I didn't find a function which supports this. In my index.ios.js
@redmar @mojodna @aroth