一、Cocoapods安装与更新

1.首先查看 gem source 源

gem sources -l

2.删除源

gem sources --remove https://rubygems.org/

3.添加新的源

gem sources --add https://gems.ruby-china.com/

4.升级ruby

查看ruby版本：ruby -v

安装homebrew

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

可以使用rvm和brew来安装最新的ruby

• rvm:

  rvm install 2.5.3

  rvm use 2.5.3 --default

• bew:

  brew install ruby

5.安装cocoapods

sudo gem install -n /usr/local/bin cocoapods

pod setup由于网络原因，会执行的很慢

可以使用如下命令

git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git ~/.cocoapods/repos/trunk