CocoaPods问题出错

CocoaPods问题：Unable to activate xcodeproj-0.14.1 出现下面这个问题，由于在pod install，未使用sudo权限去执行，有时候犯的错误就是2，分享一下，不想其他同学也为这个问题浪费不必要的时间。

/Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1990:in raise_if_conflicts': Unable to activate xcodeproj-0.14.1, because activesupport-4.0.0.rc1 conflicts with activesupport (~> 3.0) (Gem::LoadError) from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1163:in activate’ from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1199:in block in activate_dependencies' from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1185:in each’ from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1185:in activate_dependencies' from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/specification.rb:1167:in activate’ from /Users/jimney/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/site_ruby/2.0.0/rubygems/core_ext/kernel_gem.rb:48:in `gem’ from /Users/jimney/.rvm/gems/ruby-2.0.0-p0/bin/pod:22:in