iOS 最新版 CocoaPods 的安装流程 1.移除现有Ruby默认源 $gem sources --remove https://rubygems.org/ 2.使用新的源 $gem sources -a https://ruby.taobao.org/ 3.验证新源是否替换成功 $gem sources -l 4.安装CocoaPods (1)  $sudo gem