安装 cocoapods 报错：
ERROR: Could not find a valid gem 'cocoapods' (>= 0), here is why:
Unable to download data fromhttps://ruby.taobao.org/- bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)
该问题主要是 镜像 的问题：
Mac:~ mac$ sudo gem install -n/usr/local/bin cocoapodsPassword:ERROR: Could not find a valid gem'cocoapods'(>=0), here is why: Unable to download datafromhttps://ruby.taobao.org/ - bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)-----------------------------------------https://gems.ruby-china.org/ 访问不了域名改为https://gems.ruby-china.com/-----------------------------------------所以替换 ruby-china 提供镜像，正确的操作是：$ gem sources --remove https://rubygems.org/$ gem sources --remove https://ruby.taobao.org/ // 如果安装了淘宝的镜像,也删除// 等有反应之后再敲入以下命令$ gem sources -a https://gems.ruby-china.com/为了验证你的Ruby镜像是并且仅是ruby-china，可以用以下命令查看：$ gem sources -l具体效果如下：192:~ mac$ gem sources --remove https://rubygems.org/source https://rubygems.org/ not present in cache192:~ mac$ gem sources --remove https://ruby.taobao.org/ https://ruby.taobao.org/ removed from sources192:~ mac$ gem sources -a https://gems.ruby-china.com/https://gems.ruby-china.com/ added to sources192:~ mac$ gem sources -l*** CURRENT SOURCES ***https://gems.ruby-china.com/192:~ mac$ sudo gem update --system// 更新一下Latest version already installed. Done.$ sudo gem install -n /usr/local/bin cocoapods// 安装最新版本的 cocoapods
