看到官网：
Integration With Existing Apps
（和翻译的：集成到现有原生应用 – React Native 中文网）
好像说是：
原先的OC项目中，需要用到Cocoapods才行
“CocoaPods is a package management tool for iOS and macOS development. We use it to add the actual React Native framework code locally into your current project.”
考虑到Carthage更方便
所以想去看看：
把ReactNative iOS集成到已有项目中，能否用Carthage
react native ios integrated existing objective-c project
Integrating React Native into an Existing App (iOS)
里面有详细的步骤介绍，如何集成到swift或OC
React Native Tutorial: Integrating in an Existing App
与现有的应用程序集成 – React Native 官方文档中文版 – 极客学院Wiki
How to Port Your Native Modules into a React Native Environment | Branch Blog
Integrating React Native into an existing Swift project – τarka λabs
react native ios integrated existing use carthage
Integrate RNN into a native IOS swift project · Issue #813 · wix/react-native-navigation
Import React Native dependency to existing iOS app manually – Stack Overflow
No Carthage support · Issue #13835 · facebook/react-native
有人遇到同样问题，但是官网没回复，也暂时不支持。。。
Importing RN to existing Project without CocoaPods：reactnative
Adding React Native to Existing iOS Project Without CocoaPods