Running expo hello world react native app on iOS device in Xcode requires some configuration

[YUNQIUGUO]

Context

In README.md, we documented the steps for running this expo react native hello world app for iOS as follows:

6. Run the following command to launch:

In <SOURCE_ROOT>, run the following command to launch for Android

expo run:android
In <SOURCE_ROOT>, run the following command to launch for iOS

expo run:ios

But running the expo app with Xcode seems requiring some extra config with node. It may be helpful to document this:

I found that Xcode build failed at finding the node while debugging a github issue related to react native on actual iOS device,

Error message:

Error: cannot find the node binary. Try setting the NODE_BINARY variable in the  "Bundle React Native code and images" Build Phase to the absolute path to your node binary.  You can find it by executing "which node" in a terminal window.
Command PhaseScriptExecution failed with a nonzero exit code

Setting NODE_BINARY variable as suggested actually doesn't help at least in my case. looks like the easiest is to create a sym link for node: (works for me)

See: https://stackoverflow.com/questions/44492197/react-native-ios-build-cant-find-node

Also, fwiw, actually that command expo run:ios seems only would work for iOS simulator.

i.e. From the metro bundler menu:

› Press a │ open Android
› Press i │ open iOS simulator
› Press w │ open web

› Press r │ reload app
› Press m │ toggle menu

› Press ? │ show all commands