Cocospod 升级到指定版本

gem list --local | grep cocoapods

NvrdeiMac:ValidateSwift nvr$ gem list --local | grep cocoapods
cocoapods (1.6.0.beta.1, 1.5.3)
cocoapods-core (1.6.0.beta.1, 1.5.3)
cocoapods-deintegrate (1.0.2)
cocoapods-downloader (1.2.1)
cocoapods-plugins (1.0.0)
cocoapods-search (1.0.0)
cocoapods-stats (1.0.0)
cocoapods-trunk (1.3.1, 1.3.0)
cocoapods-try (1.1.0)

sudo gem uninstall cocoapods   1.5.3

NvrdeiMac:ValidateSwift nvr$ sudo gem uninstall cocoapods 1.5.3
Gem '1.5.3' is not installed

Select gem to uninstall:
 1. cocoapods-1.5.3
 2. cocoapods-1.6.0.beta.1
 3. All versions
> 1. cocoapods-1.5.3
Successfully uninstalled cocoapods-1.5.3

sudo gem install cocoapods -v 1.6.1

ERROR:  Could not find a valid gem 'cocoapods' (= 1.6.1), here is why:
          Unable to download data from https://gems.ruby-china.org/ - bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)

NvrdeiMac:ValidateSwift nvr$ sudo gem install cocoapods -v 1.6.1
Password:
Fetching: ruby-macho-1.4.0.gem (100%)
Successfully installed ruby-macho-1.4.0
Fetching: fourflusher-2.2.0.gem (100%)
Successfully installed fourflusher-2.2.0
Fetching: xcodeproj-1.8.2.gem (100%)
Successfully installed xcodeproj-1.8.2
Fetching: cocoapods-downloader-1.2.2.gem (100%)
Successfully installed cocoapods-downloader-1.2.2
Fetching: cocoapods-core-1.6.1.gem (100%)
Successfully installed cocoapods-core-1.6.1
Fetching: cocoapods-1.6.1.gem (100%)
Successfully installed cocoapods-1.6.1
Parsing documentation for ruby-macho-1.4.0
Installing ri documentation for ruby-macho-1.4.0
Parsing documentation for fourflusher-2.2.0
Installing ri documentation for fourflusher-2.2.0
Parsing documentation for xcodeproj-1.8.2
Installing ri documentation for xcodeproj-1.8.2
Parsing documentation for cocoapods-downloader-1.2.2
Installing ri documentation for cocoapods-downloader-1.2.2
Parsing documentation for cocoapods-core-1.6.1
Installing ri documentation for cocoapods-core-1.6.1
Parsing documentation for cocoapods-1.6.1
Installing ri documentation for cocoapods-1.6.1
Done installing documentation for ruby-macho, fourflusher, xcodeproj, cocoapods-downloader, cocoapods-core, cocoapods after 7 seconds
6 gems installed
NvrdeiMac:ValidateSwift nvr$ pod --version
Ignoring eventmachine-1.2.7 because its extensions are not built. Try: gem pristine eventmachine --version 1.2.7
Ignoring ffi-1.9.25 because its extensions are not built. Try: gem pristine ffi --version 1.9.25
Ignoring http_parser.rb-0.6.0 because its extensions are not built. Try: gem pristine http_parser.rb --version 0.6.0
1.6.1