I mean on detail scence (clicked to one of news). I see the title example is "How we built Facebook Lite for..." that is you had substring the full title, right ? But I wonder do it's length responsive to screen size ? Example : With bigger screen size, title will be display more longer "How we built Facebook Lite for every Android..."

Hmm, I don't actually control that. I use NavigatorIOS which just need to pass the 'title' string. http://facebook.github.io/react-native/docs/navigatorios.htm...

Well, because as the mention that is NavigatorIOS will be discontinue maintained and also hear from them about the new Experiment Navigation so that I have not ever tried NavigatorIOS. Curiously why you want use NavigatorIOS ?

I use NavigatorIOS mainly because it looks more native on iOS (with blurred background), though less customisable and sometimes buggy. Navigator and NavigationExperimental is more customizable but somehow looks "off".