cocoapods更新

1.查看版本号，使用命令: pod --version

caoyuanyuandeMacBook-Pro:~ cyy$ pod --version
1.5.3

2.查看ruby源地址，目前淘宝的不能用了，而且域名.org也不支持了，需要使用 https://gems.ruby-china.com/替换

$ gem source -l
*** CURRENT SOURCES ***

https://ruby.taobao.org/

2.1.移除旧的源 命令: "gem sources --remove"

$ gem sources --remove https://ruby.taobao.org/

2.2.添加新的源 命令: "gem sources -a https://gems.ruby-china.com/"

$ gem sources -a https://gems.ruby-china.com/

2.3.查看当前ruby源地址是否更改成功

$ gem sources -l
*** CURRENT SOURCES ***

https://gems.ruby-china.com/

3.更新cocoapods
输入命令和电脑开机密码 "sudo gem install cocoapods"