Mac CocoaPods错误集锦

• 错误：
  Error fetching http://ruby.taobao.org/:
bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)
  解决方案：
  把安装流程中 $gem sources -a http://ruby.taobao.org/ ---改为----$gem sources -a https://ruby.taobao.org/
  也就是执行命令

  gem sources --remove http://ruby.taobao.org
  gem sources -a https://ruby.taobao.org
  

• 错误
  ERROR: While executing gem ... (Errno::EPERM) Operation not permitted - /usr/bin/xcodeproj
  解决方法
  把安装的语句改成

  sudo gem install -n /usr/local/bin cocoa pods