升级了cocoapods导致search命令失效的解决办法

执行pod search XXX 提示 "[!] Unknown command: search"

解决办法

1. 查看当前ruby版本
   执行rvm list

 ruby-2.4.1 [ x86_64 ]
 ruby-2.4.4 [ x86_64 ]
 ruby-2.7.2 [ x86_64 ]
=* ruby-3.0.0 [ x86_64 ]

2. 选择2.x.x版本
   执行rvm use ruby-2.7.2
Using /Users/xxx/.rvm/gems/ruby-2.7.2

3.执行
echo 'export PATH="/Users/xxx/.rvm/rubies/ruby-2.7.2/bin/ruby/bin:$PATH"' >> ~/.zshrc
source ~/.zshrc