CocoaPods on Xcode 6 and Yosemite

老子今天又给环境跪了。。。。。

cocoapods 在升级完新系统以后无法工作

解决cocoapods 在 mac 10.10下报错

错误例如以下。

/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require': cannot load such file -- xcodeproj/prebuilt/universal.x86_64-darwin14-2.0.0/xcodeproj_ext (LoadError)
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.16.1/lib/xcodeproj/ext.rb:6:in `rescue in '
from /Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.16.1/lib/xcodeproj/ext.rb:3:in `'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Gems/2.0.0/gems/xcodeproj-0.16.1/lib/xcodeproj.rb:30:in `'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-0.32.1/lib/cocoapods.rb:2:in `'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-0.32.1/bin/pod:32:in `'
from /usr/bin/pod:23:in `load'
from /usr/bin/pod:23:in `<main>'




解决方法：

1. Open Xcode 6
2. Open Preferences
3. Click the Locations tab
4. Change the Command Line Tools version to Xcode 6.0
5. Uninstall cocoapods
   a. $ sudo gem uninstall cocoapods
   
6. Install xcodeproj
   a. $ sudo gem install xcodeproj
   
7. Install cocoapods
   a. $ sudo gem install cocoapods
   
8. Run pod --version to verify that it worked