iOSアプリ開発の処方箋 : Unable to find a specification for `AFNetworking (~> 2.0)`. ref: http://qiita.com/y-ken/items/2e4c3fed1d29e8f5d6ba

file0.txt

$ rake
================================================================================
A new version of RubyMotion is available. Run `sudo motion update' to upgrade.
================================================================================

rake aborted!
Pod::Informative: [!] Unable to find a specification for `AFNetworking (~> 2.0)`.
/Users/y-ken/Documents/htdocs/motion-octofeed/vendor/bundle/ruby/2.1.0/gems/cocoapods-0.23.0/lib/cocoapods/resolver.rb:195:in `find_cached_set'
/Users/y-ken/Documents/htdocs/motion-octofeed/vendor/bundle/ruby/2.1.0/gems/cocoapods-0.23.0/lib/cocoapods/resolver.rb:153:in `block (2 levels) in find_dependency_specs'

...snip...

file1.txt

$ pod
pod2html        pod2latex       pod2man         pod2readme      pod2text        pod2usage       podchecker      podselect
pod2html5.12    pod2latex5.12   pod2man5.12     pod2readme5.12  pod2text5.12    pod2usage5.12   podchecker5.12  podselect5.12
pod2html5.16    pod2latex5.16   pod2man5.16     pod2readme5.16  pod2text5.16    pod2usage5.16   podchecker5.16  podselect5.16

$ pod setup
-bash: pod: command not found

file2.txt

$ gem install cocoapods
Fetching: i18n-0.7.0.beta1.gem (100%)
Successfully installed i18n-0.7.0.beta1
Fetching: multi_json-1.10.1.gem (100%)
Successfully installed multi_json-1.10.1
Fetching: activesupport-3.2.19.gem (100%)
Successfully installed activesupport-3.2.19
Fetching: nap-0.8.0.gem (100%)
Successfully installed nap-0.8.0
Fetching: json_pure-1.8.1.gem (100%)
Successfully installed json_pure-1.8.1
Fetching: fuzzy_match-2.0.4.gem (100%)
Successfully installed fuzzy_match-2.0.4
Fetching: cocoapods-core-0.33.1.gem (100%)
Successfully installed cocoapods-core-0.33.1
Fetching: claide-0.6.1.gem (100%)
Successfully installed claide-0.6.1
Fetching: colored-1.2.gem (100%)
Successfully installed colored-1.2
Fetching: xcodeproj-0.17.0.gem (100%)
Building native extensions.  This could take a while...
Successfully installed xcodeproj-0.17.0
Fetching: cocoapods-downloader-0.6.1.gem (100%)
Successfully installed cocoapods-downloader-0.6.1
Fetching: cocoapods-plugins-0.2.0.gem (100%)
Successfully installed cocoapods-plugins-0.2.0
Fetching: cocoapods-try-0.3.0.gem (100%)
Successfully installed cocoapods-try-0.3.0
Fetching: netrc-0.7.7.gem (100%)
Successfully installed netrc-0.7.7
Fetching: cocoapods-trunk-0.1.4.gem (100%)
Successfully installed cocoapods-trunk-0.1.4
Fetching: escape-0.0.4.gem (100%)
Successfully installed escape-0.0.4
Fetching: open4-1.3.4.gem (100%)
Successfully installed open4-1.3.4
Fetching: cocoapods-0.33.1.gem (100%)

CHANGELOG:

## 0.33.1

##### Bug Fixes

* Fix `pod spec lint` for `json` podspecs.
  [Fabio Pelosin][irrationalfab]
  [#2157](https://github.com/CocoaPods/CocoaPods/issues/2157)

* Fixed downloader issues related to `json` podspecs.
  [Fabio Pelosin][irrationalfab]
  [#2158](https://github.com/CocoaPods/CocoaPods/issues/2158)

* Fixed `--no-ansi` flag in help banners.
  [Fabio Pelosin][irrationalfab]
  [#34](https://github.com/CocoaPods/CLAide/issues/34)

Successfully installed cocoapods-0.33.1
18 gems installed

file3.txt

# 動作確認を兼ねてバージョンを確認
$ pod --version
0.33.1

$ pod setup
Setting up CocoaPods master repo
Setup completed (read-only access)

file4.txt

Pod::Informative: [!] The `master` repo requires CocoaPods 0.32.1 -

file5.txt

$ gem install cocoapods -v 0.32.1
$ rm Gemfile.lock
$ bundle install --path vendor/bundle