React-native 初始化 Command `yarn add react-native --exact` failed.

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执行

npm config set registry https://registry.npm.taobao.org
npm config set disturl https://npm.taobao.org/dist

重新初始化即可，如果遇到

npm update check failed
Try running with sudo or get access 
to the local update config store via

尝试执行

sudo chown -R $USER:$(id -gn $USER) /Users/用户名/.config
//例如 sudo chown -R $USER:$(id -gn $USER) /Users/ruff/.config

重新执行即可。