1. 升级 react native 到 0.47 遇到的问题
react-native upgrade
1.1. Command /bin/sh failed with exit code 1
退出重新打开 Xcode
1.2. 'boost/iterator/iterator_adaptor.hpp' file not found
参考 https://github.com/facebook/react-native/issues/14423
1.
从 https://sourceforge.net/projects/boost/files/boost/1.63.0/ 下载 boost_1_63_0.tar.gz 到 ~/.rncache/boost_1_63_0.tar.gz，如果存在就替换它
2.
rm -rf node_modules
3.
command + shift + K
4.
command + B