卸载当前CocoaPods并安装指定版本

查看组件位置并移除

查看位置
which pod
结果
/usr/local/bin/pod
移除
sudo rm -rf /usr/local/bin/pod

查看当前版本

gem list

结果

*** LOCAL GEMS ***

activesupport (4.2.11.3)
algoliasearch (1.27.4)
atomos (0.1.3)
bigdecimal (default: 1.4.1)
bundler (default: 1.17.2)
CFPropertyList (2.3.6)
claide (1.0.3)
cmath (default: 1.0.0)
cocoapods (1.9.3)
cocoapods-clean (0.0.1)
cocoapods-core (1.9.3)
cocoapods-deintegrate (1.0.4)
cocoapods-downloader (1.4.0)
cocoapods-plugins (1.0.0)
cocoapods-search (1.0.0)
cocoapods-stats (1.1.0)
cocoapods-trunk (1.5.0)
cocoapods-try (1.2.0)
colored2 (3.1.2)
concurrent-ruby (1.1.7)
csv (default: 3.0.9)
date (default: 2.0.0)
dbm (default: 1.0.0)
did_you_mean (1.3.0)
e2mmap (default: 0.1.0)
escape (0.0.4)
etc (default: 1.0.1)
ethon (0.12.0)
fcntl (default: 1.0.0)
ffi (1.13.1)
fiddle (default: 1.0.0)
fileutils (default: 1.1.0)
forwardable (default: 1.2.0)
fourflusher (2.3.1)
fuzzy_match (2.0.4)
gh_inspector (1.1.3)
httpclient (2.8.3)
i18n (0.9.5)
io-console (default: 0.4.7)
ipaddr (default: 1.2.2)
irb (default: 1.0.0)
json (default: 2.1.0)
libxml-ruby (3.1.0)
logger (default: 1.3.0)
matrix (default: 0.1.0)
mini_portile2 (2.4.0)
minitest (5.11.3)
molinillo (0.6.6)
mutex_m (default: 0.1.0)
nanaimo (0.3.0)
nap (1.1.0)
net-telnet (0.2.0)
netrc (0.11.0)
nokogiri (1.10.1)
openssl (default: 2.1.2)
ostruct (default: 0.1.0)
power_assert (1.1.3)
prime (default: 0.1.0)
psych (default: 3.1.0)
rake (12.3.2)
rdoc (default: 6.1.0)
rexml (default: 3.1.9)
rss (default: 0.2.7)
ruby-macho (1.4.0)
scanf (default: 1.0.0)
sdbm (default: 1.0.0)
shell (default: 0.7)
sqlite3 (1.3.13)
stringio (default: 0.0.2)
strscan (default: 1.0.0)
sync (default: 0.5.0)
test-unit (3.2.9)
thread_safe (0.3.6)
thwait (default: 0.1.0)
tracer (default: 0.1.0)
typhoeus (1.4.0)
tzinfo (1.2.7)
webrick (default: 1.4.2)
xcodeproj (1.19.0)
xmlrpc (0.3.0)
zlib (default: 1.0.0)

移除

sudo gem uninstall cocoapods -v 1.9.3

输入y确定

Remove executables:
    pod, sandbox-pod

in addition to the gem? [Yn]  y
Removing pod
Removing sandbox-pod
Successfully uninstalled cocoapods-1.9.3

安装指定版本

sudo gem install cocoapods -v 1.8.3