Add rn-nodeify to your devDependencies in package.json:
"devDependencies": { "rn-nodeify": "^6.0.1" }
Add the following to the scripts section of the same file:
"scripts": { … "postinstall": "node_modules/.bin/rn-nodeify --install crypto --hack" }
npm i --save react-native-crypto # install peer deps npm i --save react-native-randombytes react-native link react-native-randombytes # install latest rn-nodeify npm i --save-dev mvayngrib/rn-nodeify # install node core shims and recursively hack package.json files # in ./node_modules to add/update the "browser"/"react-native" field with relevant mappings ./node_modules/.bin/rn-nodeify --hack --install
Unable to resolve module crypto
原文：https://www.cnblogs.com/qiyecao/p/9678326.html