按照中文网一步一步往下：
1.先安装这个brew ，打开网址：https://brew.sh里头有安装指令：
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
安装完brew，就可以安装node ，watchman,yarn,cocoapods
如果安装brew报错：
Failed to connect to raw.githubusercontent.com port 443: Connection refused
打开此网站（https://githubusercontent.com.ipaddress.com/raw.githubusercontent.com
）查看raw.githubusercontent.com 的ip地址，然后修改 /etc/hosts 文件，新增：
# 你查到的IP地址
199.232.68.133 githubusercontent.com
brew install node
brew install watchman
# 使用nrm工具切换淘宝源
npx nrm use taobao
npm install -g yarn
brew install cocoapods
最后就是：
cd AwesomeProject
yarn ios
# 或者
yarn react-native run-ios
会有一个报错：
error Error: Failed to install CocoaPods dependencies for iOS project, which is required by this template.
Please try again manually: "cd ./iosProject/ios && pod install".
这个没事，按照提示：
#先设置xcode路径
sudo xcode-select --switch /Applications/Xcode.app
cd ./iosProject/ios && pod install
