然后整出了些幺蛾子
1.淘宝镜像,这步出错了直接看这里：
2.然后 输入 sudo gem install cocoapods 之后，出现如下问题：
ERROR: While executing gem ... (Gem::DependencyError)
Unable to resolve dependencies: cocoapods requires cocoapods-core (= 0.33.1), claide (~> 0.6.1), cocoapods-downloader (~> 0.6.1), cocoapods-plugins (~> 0.2.0), cocoapods-try (~> 0.3.0), cocoapods-trunk (~> 0.1.1), nap (~> 0.7)
sudo gem install -n /usr/local/bin cocoapods
解决方法：sudo gem update --system
3.然后出错了：
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/pod
解决办法 ：sudo gem install cocoapods ——>改为sudo gem install -n /usr/local/bin cocoapods
