CocoaPods 更新遇到的坑（ERROR: While executing gem ... (Errno::EPERM) Operation not permitted - /usr/bin/f）

在运行 “sudo gem install cocoapods” 的时候出现问题：ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/fuzzy_match

则可以改为：
sudo gem install -n /usr/local/bin cocoa pods

首先查看自己的pods现有版本：

gem list  

这样会看到现在安装的版本号，然后

移除程序包

1	$ sudo gem uninstall cocoapods - v 0.35.0

输出

1	Successfully uninstalled cocoapods - 0.35.0

1	$ sudo gem uninstall cocoapods - core - v 0.35.0

输出

1	Successfully uninstalled cocoapods - core - 0.35.0

然后安装指定版本的Cocoapods

1	$  sudo gem install cocoapods - v 0.34.4