CocoaPods 卸载 更新

$pod repo remove master  //删除
$ sudo gem install -n/usr/local/bin cocoapods //重新装
$ pod //检查一下
$ pod setup //下载（特别慢,文件大小380M+）

192:~ mac$ pod repo remove master
Removing spec repo `master`
192:~ mac$ sudo gem install -n/usr/local/bin cocoapods
Password:
Successfully installed cocoapods-1.2.0
Parsing documentation for cocoapods-1.2.0
Done installing documentation for cocoapods after 2 seconds
1 gem installed
192:~ mac$ pod
Usage:

    $ pod COMMAND

      CocoaPods, the Cocoa library package manager.

Commands:

    + cache         Manipulate the CocoaPods cache
    + deintegrate   Deintegrate CocoaPods from your project
    + env           Display pod environment
    + init          Generate a Podfile for the current directory
    + install       Install project dependencies according to versions from a
                    Podfile.lock
    + ipc           Inter-process communication
    + lib           Develop pods
    + list          List pods
    + outdated      Show outdated project dependencies
    + plugins       Show available CocoaPods plugins
    + repo          Manage spec-repositories
    + search        Search for pods
    + setup         Setup the CocoaPods environment
    + spec          Manage pod specs
    + trunk         Interact with the CocoaPods API (e.g. publishing new specs)
    + try           Try a Pod!
    + update        Update outdated project dependencies and create new
                    Podfile.lock

Options:

    --silent        Show nothing
    --version       Show the version of the tool
    --verbose       Show more debugging information
    --no-ansi       Show output without ANSI codes
    --help          Show help banner of specified command
192:~ mac$ pod setup
Setting up CocoaPods master repo
  $ /usr/bin/git clone https://github.com/CocoaPods/Specs.git master --progress
  Cloning into 'master'...
  remote: Counting objects: 1125146, done.        
  remote: Compressing objects: 100% (207/207), done.        
  remote: Total 1125146 (delta 79), reused 1 (delta 1), pack-reused 1124926        
  Receiving objects: 100% (1125146/1125146), 382.59 MiB | 219.00 KiB/s, done.
  Resolving deltas: 100% (528214/528214), done.
  Checking out files: 100% (141345/141345), done.

CocoaPods 1.2.1.beta.1 is available.
To update use: `sudo gem install cocoapods --pre`
[!] This is a test version we'd love you to try.

For more information, see https://blog.cocoapods.org and the CHANGELOG for this version at https://github.com/CocoaPods/CocoaPods/releases/tag/1.2.1.beta.1

Setup completed