chenfengdeMacBook-Pro:~ chenfeng$ gem install cocoapods
/Users/chenfeng/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:17:in `require': cannot load such file -- stringio (LoadError)
from /Users/chenfeng/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:17:in `<top (required)>'
from /Users/chenfeng/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/site_ruby/2.0.0/rubygems.rb:1333:in `require'
from /Users/chenfeng/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/site_ruby/2.0.0/rubygems.rb:1333:in `<module:Gem>'
from /Users/chenfeng/.rvm/rubies/ruby-2.0.0-p643/lib/ruby/site_ruby/2.0.0/rubygems.rb:116:in `<top (required)>'
from <internal:gem_prelude>:1:in `require'
from <internal:gem_prelude>:1:in `<compiled>'
求大神指点
It should be a problem with the source. If you use the official source, please check whether the ladder is working properly, otherwise you should change to the source of ruby-china
I also encountered the same problem. Have you solved it? Please give me some advice. QQ: 823895643