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