cd /Users/haijunyan/Desktop/CustomKit/KeepThreadAlive/KeepThreadAlive //Podfile所在文件夹
git config --global https.postBuffer 10485760000
git config --global http.postBuffer 10485760000
pod install

https://blog.csdn.net/weixin_41872403/article/details/86769287

无法访问 ‘https://github.com/CocoaPods/Specs.git/’：Failed to connect to github.com port 443 after 75011 ms: Couldn’t connect to server

切换网络环境至外网
github.com/CocoaPods/Specs.git

备注：
ssh-add /Users/haijunyan/.ssh/id_rsa
ssh-add -K /Users/haijunyan/.ssh/id_rsa