先依照这个文章做：http://blog.csdn.net/dqjyong/article/details/37958067
大概过程例如以下：
- Open Xcode 6
Open Preferences
Click the
Locations tabChange the
Command Line Tools version to Xcode 6.0Uninstall
cocoapods
a. $ sudo gem uninstall cocoapods
Install xcodeproj
a. $ sudo gem install xcodeproj
Install cocoapods
a. $ sudo gem install cocoapods
Run pod --version to verify that it worked
假设你运行到第6步：sudo gem install xcodeproj 成功，可是到第七步：$ sudo gem install cocoapods 时失败，错误信息例如以下：
ERROR: Could not find a valid gem 'cocoapods' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - Errno::ETIMEDOUT: Operation timed out - connect(2) (https://rubygems.org/latest_specs.4.8.gz)
ERROR: Possible alternatives: cocoapods
意识是说在官方源中找不到我们须要的源，这时怎么办呢，网上找到一篇博客，这样做的。切换官方源。也即是改变源的获取地址
这时候我们须要改变 gem source, 參考[4], [5]。
须要在终端中运行例如以下命令:
$ gem sources -l
$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l
接下来输入下面命令：
$ pod setup
This process will likely take a while as this command clones the CocoaPods Specs repository
into ~/.cocoapods/ on your computer. [6]
至此CocoaPods安装完成。
注： 假设漏掉 "$ pod setup" 命令，而直接运行"$ pod init"
会有类似下面的error信息：
"$ pod init
Setting up CocoaPods master repo
[!] /usr/bin/git clone 'https://github.com/CocoaPods/Specs.git' master --depth=1
Cloning into 'master'...
error: RPC failed; result=52, HTTP code = 0
fatal: The remote end hung up unexpectedly
/Library/Ruby/Gems/2.0.0/gems/claide-0.6.1/lib/claide/command.rb:304:in `handle_exception': undefined method `verbose?' for nil:NilClass (NoMethodError)
from /Library/Ruby/Gems/2.0.0/gems/claide-0.6.1/lib/claide/command.rb:284:in `rescue in run'
from /Library/Ruby/Gems/2.0.0/gems/claide-0.6.1/lib/claide/command.rb:274:in `run'
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-0.33.1/lib/cocoapods/command.rb:48:in `run'
from /Library/Ruby/Gems/2.0.0/gems/cocoapods-0.33.1/bin/pod:33:in `<top (required)>'
from /usr/bin/pod:23:in `load'
from /usr/bin/pod:23:in `<main>' "
以上操作步骤完毕后在进行：$ sudo gem install cocoapods
这时就成功了！
剩下的就是和曾经的一样在project文件夹下，建Podfile，运行pod install，打开xworkspace等，顺利完毕！
！。
參考博客：http://www.cnblogs.com/cwgk/p/3370949.html
