macOS:12.2 cocoapods版本：1.10.1 ruby：2.7.0
安装最新版cocoapods时，pod install时出现下列问题:
/Library/Ruby/Gems/2.6.0/gems/activesupport-6.0.0.rc2/lib/active_support/multibyte/unicode.rb:123:in `normalize': undefined method `squish' for #<String:0x00007fe91b0712a8> (NoMethodError)
愿意时需要升级Ruby，系统默认的是2.6.3
尝试用RVM升级Ruby
http://blog.csdn.net/lissdy/article/details/9191351
如果碰到下面问题
Searching for binary rubies, this might take some time.
No binary rubies available for: osx/10.11/x86_64/ruby-2.2.4.
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.......
Error running ‘requirements_osx_brew_update_system ruby-2.2.4‘,
先运行下面命令，再安装：
rvm autolibs read-only
1、需要提前安装homebrew、RVM、Ruby等；步骤可以百度；当安装rvm时会出现Warning! PATH is not properly set up, /Users/ios-oc/Software/ruby/bin is not at first place. 的问题是因为输入了rvm 的操作 ；
下载ruby的时候会提示去一个log文件里查看失败信息 其中包含cannot load such file -- openssl (LoadError)；
这时候需要重新去下载OpenSSL ：终端操作：% rvm pkg install openssl 首先需要下载openssl，提示成功后输入
rvm reinstall ruby-2.7.0 --with-openssl-dir=$rvm_path/usr
可以选择自己想要下载的ruby版本 ruby -v 查看版本；
2、这时，输入pod -v 提示：
Traceback (most recent call last):
2: from /usr/local/bin/pod:23:in `<main>'
1: from /Library/Ruby/Site/2.6.0/rubygems.rb:300:in `activate_bin_path'
/Library/Ruby/Site/2.6.0/rubygems.rb:281:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) with executable pod (Gem::GemNotFoundException)
需要输入：rvm get stable
最后安装cocoapods：gem install cocoapods 安装成功。
ps：路径：/user/ios-oc(本机地址)/.bash_profile;
sudo chmod -R +rx /usr/bin 添加读写权限
彻底删除cocoapods:sudo gem uninstall -n /usr/local/bin cocoapods
显示隐藏文件命令行：https://blog.csdn.net/qq_32666701/article/details/80607646 ；
1、期间在.bash_profile文件中 增加了export PATH="/usr/local/opt/ruby/bin:$PATH" 还有两行不确定是否添加我全部贴出来了：
[[ -s "$HOME/.profile" ]] && source "$HOME/.profile" # Load the default .profile
export GEM_HOME=$HOME/Software/ruby
export PATH=PATH:PATH:HOME/Software/ruby/bin
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*
export PATH="/usr/local/opt/ruby/bin:$PATH"
2、.bashrc文件如下：
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
# for brew install
export PATH=/usr/local/bin:$PATH
# Add RVM to PATH for scripting. Make sure this is the last PATH variable change.
export PATH=/usr/bin/ruby:$PATH
还有最后借鉴：https://www.wddsss.com/main/displayArticle/230下面是内容：
首先需要在 Mac 中安装 Ruby 环境rvm
1： 安装rvm 和nvm类似，用于管理Ruby的版本
curl-sSL https://get.rvm.io | bash -s stable
2: 下载成功后设置环境变量
source~/.rvm/scripts/rvmrvm-v //检查是否设置成功
3: 设置Ruby china镜像
echo"ruby_url=https://cache.ruby-china.org/pub/ruby"> ~/.rvm/user/db
安装 Ruby
1: 查询可安装版本
rvmlist known
当前最新版本为 2.7.0
2: 开始安装
rvminstall2.7.0
3: 检验安装
ruby-v
安装cocoaPods
1: 开始安装
geminstall cocoapods
2: 检验安装
pod-v
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