The Viro Developer Hub

Welcome to the Viro developer hub. You'll find comprehensive guides and sample code to help you start working with Viro as quickly as possible, as well as support if you get stuck. Let's jump right in!

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Integrating with React Native Projects

ViroReact was built with React Native integration in mind. The top-level ViroSceneNavigator component was built to work alongside and with other React Native components.

An example app using React Native components combined with Viro components:

Our "Hello World" application created with react-viro init in Quick Start (Mac/Linux) also is an example of a "hybrid" React Native/ViroReact app.

Adding Viro to an Existing React Native project

If you already have a React Native app and want to add Viro React as dependency you'll need to follow the following steps:

For iOS:
1) Edit your <project_name>/package.json to include Viro React. It's strongly recommended you use the RN version recommended in the Releases tab. Add the following to your dependencies in your package.json (for the "react-viro" line use the latest version of ViroReact, found in the Release page):

 "dependencies": {
    "react": "16.3.1",
    "react-native": "0.55.1",
    "react-viro": "2.7.3"

2) Run npm install to install the Viro React module.
3) Make sure you have cocoapods. Type 'brew install cocoapods' to install.
4) Create a podfile. The podfile will go under your <project_name>/ios directory and look like the following:

target '<project name>' do
  pod 'ViroReact', :path => '../node_modules/react-viro/ios/'
  pod 'ViroKit', :path => '../node_modules/react-viro/ios/dist/ViroRenderer/'

5) Run pod install from the <project_name>/ios directory to install the react-viro pods.
6) Open the <project_name>.xcworkspace file that was created with from the 'pod install' command.
7) In Xcode->Build Settings set 'Enable Bitcode' to 'No'.
8) In your Info.plist file add the 'Privacy - Camera Usage Description' Key with description being 'Used for AR/VR'.
9) Build the App.

Note: Possible linking error with vlog_is_on.oo

If you run into a linking error with vlog_is_on.oo( do the following:

a) In XCode open node_modules/react-native/third-party/glog-0.3.4/src/
b) Edit line 52, change the line to(rename v to v2): GLOG_DEFINE_int32(v2, 0, "Show all VLOG(m) messages for m <= this."
c) Edit line 55: change the line frome GLOG_DEFINE_string(vmodule... to GLOG_DEFINE_string(vmodule2...
d) Edit line 133: Change the line to const char* vmodule = FLAGS_vmodule2.c_str()
e) Recompile, the app should link.

For Android:

For Android, do the following:
1) Do steps 1 and 2 from the the iOS instructions above if you haven't already.
2) Go through the following git gist which shows the difference between a newly created React Native project config files and the changes needed to add Viro React. And add the proper lines to your Android Manifest and Gradle files:

Note: If you aren't developing for Samsung Gear(OVR) you can ignore the OVR related changes specified in the Git gist.

Updated about a month ago

Integrating with React Native Projects

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