pod install
/Library/Ruby/Site/2.0.0/rubygems.rb:250:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) (Gem::GemNotFoundException)
from /Library/Ruby/Site/2.0.0/rubygems.rb:278:in `activate_bin_path'
from /usr/local/bin/pod:22:in `<main>'
第一步
重新安装
rvm reinstall ruby --disable-binary
第二步
卸载安装的cocoapods
sudo gem uninstall cocoapods
第三步
安装
sudo gem install -n /usr/local/bin cocoapods
