npm install jcore-react-native --save
react-native link

If you prefer CocoaPods

pod 'JCoreRN', :path => '../node_modules/jcore-react-native'

If you are using jpush-react-native/jmessage-react-plugin/jshare-react-native/janalytics-react-native, please note the versions of jcore, jcore must matchs the versions the these libraries, detail information please refer to release note and version.txt( Under the android & iOS folder).