使用cocoapods出现某些错误

在更新cocoapods时，出现错误，找了半天终于在stackoverflow上找到答案：

/Users/myusername/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:298:in `to_specs': Could not find 'cocoa pods' (>= 0) among 37 total gem(s) (Gem::LoadErrorfrom

/Users/quique123/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:309:in `to_spec'from

/Users/quique123/.rvm/rubies/ruby-1.9.3-p194/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_gem.rb:53:in `gem from

/Users/quique123/.rvm/rubies/ruby-1.9.3-p194/bin/pod:22:in `<main>'

 答案：

Do not use sudo gem install cocoapods if you have rvm installed. It creates a few problems. Follow these steps to fix your cocoapods installation:

1. Uninstall Cocoapods:

   sudo gem uninstall cocoapods

2. Make sure you're on the latest Ruby:

   which ruby

3. Install cocoapods without sudo:

   gem install cocoapods -V --no-ri --no-rdoc
   # V: Verbose; no-ri,no-rdoc: Do not install documentation

4. Set up Cocoapods:

   pod setup

Should work now.

原来是我以前安装是用了sudo，导致位置不对

重新设置一下就行了。