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从git上下载的项目运行后：The file “Pods.xcconfig” couldn’t be opened because there is no such file.
1、检查当前ruby版本
$gem sources -
成功后提示：
*** CURRENT SOURCES ***
https://ruby.taobao.org/
否则，移除现有的ruby：$gem sources --remove https://rubygems.org/；添加使用淘宝镜像：$gem sources -a https://ruby.taobao.org/
2、开始安装cocoapods
$sudo gem install cocoapods
运行后出现错误
2.1检查ruby版本
$ruby -v
ruby 2.0.0p648 (2015-12-16 revision 53162) [universal.x86_64-darwin15]
2.2需要升级ruby；
查看目前所有ruby版本：$rvm list known 如果提示command not found
$curl -L get.rvm.io | bash -s stable
请先安装rvm：rvm install 2.2.2 ；如果不成功，检查homebrew卸载安装
卸载：
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/uninstall)"
Failed to locate Homebrew!解决问题：删除原来的安装目录
rm -rf Cellar Frameworks Homebrew重新执行安装：
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"运行后有下边提醒，则出现安装成功：
==> Installation successful!在执行：$ rvm install 2.2.2
运行结果：
Please be aware that you just installed a ruby that requires 1 patches just to be compiled on an up to date linux system.
This may have known and unaccounted for security vulnerabilities.
Please consider upgrading to ruby-2.3.0 which will have all of the latest security patches.
Ruby was built without documentation, to build it run: rvm docs generate-ri成功
之后就开始安装cocoapods：$sudo gem install cocoapods
结果：
Installing ri documentation for cocoapods-1.0.1
Done installing documentation for nap, fourflusher, escape, colored, concurrent-ruby, thread_safe, tzinfo, i18n, activesupport, claide, xcodeproj, molinillo, cocoapods-try, netrc, cocoapods-trunk, cocoapods-stats, cocoapods-search, cocoapods-plugins, cocoapods-downloader, cocoapods-deintegrate, fuzzy_match, cocoapods-core, cocoapods after 146 seconds
23 gems installed
则安装成功 》
谨记：运行pod install时总是卡在Setting up CocoaPods master repo，因为这条命令被墙了，换成pod install --verbose --no-repo-update
pod update --- > pod update --verbose --no-repo-update
来源：oschina
链接：https://my.oschina.net/u/2532095/blog/750122