We've seen previous efforts from the community in making the Facebook iOS SDK accessible from React Native. While we surely appreciate them there's no doubt that an official wrapper from Facebook for their iOS SDK is more than welcome.

react-native-fbsdk on GitHub (Sample)

React Native FBSDK is a wrapper around the iOS Facebook SDK, allowing for Facebook integration in React Native apps. Access to native components, from login to sharing, is provided entirely through documented JavaScript modules so you never have to call a single native function directly.

Functionality is provided through three separate npm packages so you never have to include more than you need:

• react-native-fbsdkcore
• react-native-fbsdkshare
• react-native-fbsdklogin

Facebook SDK for iOS

react-native-fbsdkcore

• Graph Requests
• App events

react-native-fbsdklogin

• Login Button
• Login Manager

react-native-fbsdkshare

• Share dialogs
• Share API