Can NavigatorIOS notify that a "back" happened?

[zertosh]

Not sure if I'm missing something, but does NavigatorIOS have a way of notifying its owner that there is a new top route because the "<" back button was pressed? Otherwise, to get that functionality, the removed component would have to itself notify during componentWillUnmount, and that just feels weird.

[vjeux]

cc @evv

[vjeux]

@ericvicenti actually :p

[zertosh]

@vjeux: So far I'm having a great time with react-native. I wrote a tumblr browser that uses the flux pattern heh. This is what it looks like: min-s-react-native-demo-gif. (I'm not inlining the gif because it's too distracting.)

[vjeux]

Nice! Glad to hear :)

Hopefully we can get gif support soon so that you can have a fully functional app soon

[paramaggarwal]

Unfortunately, the default back button of UINavigationController does not provide an event. The way to get around it is to either set your custom back button on the left side, or to implement - viewWillDisappear: in iOS. So I guess, this limitation is here to stay.

[vjeux]

Since iOS doesn't support it, let's close this for now.

[liubko]

@paramaggarwal is it possible to be notified when any rote changes?
something like

<NavigatorIOS onChange={...}
              initialRoute={...} />

I mean when someone do navigator.push(...)

[paramaggarwal]

@liubko please look into Navigator instead, which is much more customisable. Docs are here: Navigator Comparison

[arypurnomoz]

i think you can wrap the route component with a wrapper and listen to the wrapper's componentWillUnmount