把框架上传cocoapods遇到的一个问题

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解决问题方法：

所有项目的Podspec文件都托管在https://github.com/CocoaPods/Specs,
第一次执行pod setup时,CocoaPods会将这些podspec索引文件更新到本地的~/.cocoapods目录下,
这个索引文件比较大,所以第一次更新时非常慢.
友好人士在国内的服务器建立了Cocoapods索引库的镜像,
所以执行索引跟新操作时候会快很多.具体操作方法如下:
$ pod repo remove master
$ pod repo add master https://gitcafe.com/akuandev/Specs.git
$ pod repo update
这是使用gitcafe上的镜像,将以上代码中的 https://gitcafe.com/akuandev/Specs.git 
替换成 http://git.oschina.net/akuandev/Specs.git 即可使用oschina上的镜像。