Cocoapods installation error

Preface

CocoaPods Installation error

The information is as follows ：

Fetching cocoapods-deintegrate-1.0.5.gem
Fetching ffi-1.15.5.gem
Fetching ethon-0.15.0.gem
Fetching typhoeus-1.4.0.gem
Fetching public_suffix-4.0.6.gem
Fetching fuzzy_match-2.0.4.gem
Fetching concurrent-ruby-1.1.9.gem
Fetching json-2.6.1.gem
Fetching httpclient-2.8.3.gem
Fetching algoliasearch-1.27.5.gem
Fetching addressable-2.8.0.gem
Fetching zeitwerk-2.5.4.gem
Fetching tzinfo-2.0.4.gem
Fetching minitest-5.15.0.gem
Fetching cocoapods-1.11.2.gem
Fetching i18n-1.10.0.gem
Fetching activesupport-6.1.4.6.gem
Fetching cocoapods-core-1.11.2.gem
ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0 directory.

solve ：
The premise is that I have added sudo, On going

sudo gem install -n /usr/local/bin cocoapods

It was originally a permission issue , According to the normal operation, it should use sudo Or adding a path should solve the problem , But after many attempts, it still failed , In desperation, it was renewed gem and ruby,
to update ：ruby

• Check out the current version ：
  
• List known ruby Version of
  

curl -L https://get.rvm.io | bash -s stable

load RVM Environmental Science

source ~/.rvm/scripts/rvm

Check RVM Is the installation successful ( see RVM edition )

Continue to list known ruby edition

install ruby

rvm install 2.7

install rvm Times wrong ：

[email protected] levacp % rvm install 2.7.2
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.15/x86_64/ruby-2.7.2.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for osx.
Installing requirements for osx.
Updating system - please wait
Failed to update Homebrew, follow instructions at

    https://docs.brew.sh/Common-Issues

and make sure `brew update` works before continuing.
Error running 'requirements_osx_brew_update_system ruby-2.7.2',
please read /Users/cunweizhao/.rvm/log/1646018359_ruby-2.7.2/update_system.log
Requirements installation failed with status: 1.

1、 to update brew

brew update

Prompt or no permission , I've added sudo, Go directly to the current directory to add information ：

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/gems/2.6.0 directory.

I don't think so , Then continue to search Baidu to see


Last Add the following code to one line

export PATH="/usr/local/opt/ruby/bin:$PATH"

echo 'export PATH="/usr/local/opt/ruby/bin:$PATH"' >> ~/.zshrc

success