Add support for tvOS

[hufkens]

What this PR does?

We want to use react-native-navigation for our TV Apps. Other navigation solutions don't work that well and we want the native feel. Also react-native is dropping TabBarIOS and NavigatorIOS from the core. So we need a good navigation library that we can use on al platforms.

What has changed

I added a target ReactNativeNavigation-tvOS to that builds to the tvOS SDK. This means I had to exclude not supported code using compiler flags.

Opinions?

Tell me what do you guys think? It's a start and a work in progress, and I hope that you are interested to give some feedback. We are intending to use it in our apps (iOS, Android, tvOS, Android TV).

To Do

I need to find a way to hook the Menu gesture handler, so that it will pop() the Screen until the last one and then exit the app.

[guyca]

Hey @hufkens, Looks very promising! You're welcome to ping me on discord if you need anything on our end 👍

[hufkens]

@guyca We were looking into using react-native-navigation for our TV apps. I managed to get it functionally working. But we stopped working on it because of this issue #4485

We also need the TopTabs to be working but they seem to be broken now.

There are also still 2 open issues:

• Correctly handle the "menu" button on tvOS. Pressing the menu should go back in the UINavigationController and/or close a Modal.
• The Splash screen logic now works with the xib, but there are no xibs on Apple TV. That code is commented for now and there is no splash screen shown.

I have an account on discord but don't use it that much.

[guyca]

Thanks for the update, perhaps someone will pick this up in the future 👍