$ sudo rm -rf /usr/local/bin/pod
$ gem list
然后会
** LOCAL GEMS ***
activesupport (4.2.7.1)
bigdecimal (default: 1.2.0)
CFPropertyList (2.3.3, 2.2.8)
claide (1.0.1)
cocoapods-core (1.2.0.beta.1, 1.1.1)
cocoapods-deintegrate (1.0.1)
cocoapods-downloader (1.1.2)
cocoapods-plugins (1.0.0)
cocoapods-search (1.0.0)
cocoapods-stats (1.0.0)
cocoapods-trunk (1.1.1)
cocoapods-try (1.1.0)
colored (1.2)
escape (0.0.4)
fourflusher (2.0.1)
fuzzy_match (2.0.4)
gh_inspector (1.0.2)
i18n (0.7.0)
io-console (default: 0.4.2)
json (default: 1.7.7)
libxml-ruby (2.6.0)
mini_portile2 (2.1.0)
minitest (5.9.1, default: 4.3.2)
molinillo (0.5.3)
nanaimo (0.1.4)
nap (1.1.0)
netrc (0.7.8)
nokogiri (1.5.6)
pods (0.0.1)
power_assert (0.3.1)
psych (default: 2.0.0)
rake (11.3.0, default: 0.9.6)
rdoc (4.2.2, default: 4.0.0)
ruby-macho (0.2.5)
rubygems-update (2.6.7)
sqlite3 (1.3.7)
test-unit (3.2.1, default: 2.0.0.0)
thread_safe (0.3.5)
tzinfo (1.2.2)
xcodeproj (1.4.0)
$ sudo gem uninstall cocoapods -v 1.1.1
$ gem list
$ sudo gem uninstall cocoapods -v 1.2.0.beta.1（没什么反应）
$ sudo gem uninstall cocoapods-core -v 1.2.0.beta.1
打印出Successfully uninstalled cocoapods-core-1.2.0.beta.1
$ gem list
*** LOCAL GEMS ***
activesupport (4.2.7.1)
bigdecimal (default: 1.2.0)
CFPropertyList (2.3.3, 2.2.8)
claide (1.0.1)
cocoapods-core (1.1.1)
cocoapods-deintegrate (1.0.1)
cocoapods-downloader (1.1.2)
cocoapods-plugins (1.0.0)
cocoapods-search (1.0.0)
cocoapods-stats (1.0.0)
cocoapods-trunk (1.1.1)
cocoapods-try (1.1.0)
colored (1.2)
escape (0.0.4)
fourflusher (2.0.1)
fuzzy_match (2.0.4)
gh_inspector (1.0.2)
i18n (0.7.0)
io-console (default: 0.4.2)
json (default: 1.7.7)
libxml-ruby (2.6.0)
mini_portile2 (2.1.0)
minitest (5.9.1, default: 4.3.2)
molinillo (0.5.3)
nanaimo (0.1.4)
nap (1.1.0)
netrc (0.7.8)
nokogiri (1.5.6)
pods (0.0.1)
power_assert (0.3.1)
psych (default: 2.0.0)
rake (11.3.0, default: 0.9.6)
rdoc (4.2.2, default: 4.0.0)
ruby-macho (0.2.5)
rubygems-update (2.6.7)
sqlite3 (1.3.7)
test-unit (3.2.1, default: 2.0.0.0)
thread_safe (0.3.5)
tzinfo (1.2.2)
xcodeproj (1.4.0)
此时少了1.2.0.beta.1
但我感觉之前的没什么效果，然后我就。。。。
$ https://rubygems.org/
$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l
$ sudo gem install cocoa pods（会出错，然后下面一句就ok）
$ sudo gem install -n /usr/local/bin cocoa pods
Successfully installed cocoapods-1.1.1
Parsing documentation for cocoapods-1.1.1
Done installing documentation for cocoapods after 3 seconds
1 gem installed
$ pod --version
1.1.1 （写的有些问题，仅供参考）
