安装cocoapods问题汇总

sudo gem install cocoapods

安装后，发现输完密码一直没动静。问题是因为“https://rubygems.org/“被墙了，更换gem源为“https://gems.ruby-china.org/“即可：

gem sources --add https://gems.ruby-china.org/ --remove https://rubygems.org/

再次执行“sudo gem install cocoapods“仍然报错：

ERROR:  While executing gem ... (Gem::DependencyError)
    Unable to resolve dependencies: cocoapods requires cocoapods-core (= 1.2.0), cocoapods-downloader (< 2.0, >= 1.1.3), cocoapods-trunk (< 2.0, >= 1.1.2), molinillo (~> 0.5.5), xcodeproj (< 2.0, >= 1.4.1), colored (~> 1.2), escape (~> 0.0.4), fourflusher (~> 2.0.1), gh_inspector (~> 1.0), nap (~> 1.0), ruby-macho (~> 0.2.5); activesupport requires i18n (>= 0.6.9, ~> 0.6), tzinfo (~> 1.1), minitest (~> 5.1), thread_safe (~> 0.1); cocoapods-plugins requires nap (>= 0)

出现这个问题是因为ruby版本太低，执行：

gem update --system

接着报错：

Updating rubygems-update
Fetching: rubygems-update-2.6.7.gem (100%)
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory.

报这个错是因为权限不够，加上sudo：

sudo gem update --system

接着就开始babala，开始安装了：

Updating rubygems-update
……
……
……
ERROR:  While executing gem ... (Errno::EPERM)
    Operation not permitted - /usr/bin/xcodeproj

撞到最后又丫的报错啦。网上搜索了一下，解决方案是：

sudo gem install -n /usr/local/bin cocoapods

坑有点多，也不怕吓坏小朋友，真是的……