如果Failed to connect to raw.githubusercontent.com port 443: Operation timed out
因为raw.githubusercontent.com被河蟹了
先去https://www.ipaddress.com/手动解析域名raw.githubusercontent.com查找对应的ip
然后修改本地的host文件
sudo vim /private/etc/hosts
加入指向199.232.28.133 raw.githubusercontent.com
pod install就ok了