升级cocoapods 出现如下错误信息
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
current directory: /Library/Ruby/Gems/2.3.0/gems/json-2.1.0/ext/json/ext/generator
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby -I
/Library/Ruby/Site/2.3.0 -r ./siteconf20200121-36371-s533ut.rb extconf.rb
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/universal-darwin18/rbconfig.rb:215: warning: Insecure world writable dir /usr/local/mysql/bin in PATH, mode 040777
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/include/ruby.h
extconf failed, exit code 1
Gem files will remain installed in /Library/Ruby/Gems/2.3.0/gems/json-2.1.0 for inspection.
Results logged to /Library/Ruby/Gems/2.3.0/extensions/universal-darwin-18/2.3.0/json-2.1.0/gem_make.out
网上查了各种办法都不正确
试了：
sudo gem install cocoapods
sudo gem install -n /usr/local/bin cocoapods
用命令 rvm 命令发现问题如下
-bash: rvm: command not found
于是找出此篇博客（https://www.jianshu.com/p/f5591af6859d
）
从新安装rvm ,安装地址如下
https://rvm.io/rvm/install
Install RVM stable with ruby:
\curl -sSL https://get.rvm.io | bash -s stable --ruby
安装成功后出现
...............................
ruby-2.6.3 - #installing...........
ruby-2.6.3 - #making binaries executable..
ruby-2.6.3 - #downloading rubygems-3.0.6
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 866k 100 866k 0 0 291k 0 0:00:02 0:00:02 --:--:-- 291k
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.6.3 - #extracting rubygems-3.0.6.....
ruby-2.6.3 - #removing old rubygems........
ruby-2.6.3 - #installing rubygems-3.0.6...............................................
ruby-2.6.3 - #gemset created /Users/hongbao.cui/.rvm/gems/ruby-2.6.3@global
ruby-2.6.3 - #importing gemset /Users/hongbao.cui/.rvm/gemsets/global.gems................................................................
ruby-2.6.3 - #generating global wrappers.......
ruby-2.6.3 - #gemset created /Users/hongbao.cui/.rvm/gems/ruby-2.6.3
ruby-2.6.3 - #importing gemsetfile /Users/hongbao.cui/.rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.6.3 - #generating default wrappers.......
ruby-2.6.3 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.6.3 - #complete
Ruby was built without documentation, to build it run: rvm docs generate-ri
Creating alias default for ruby-2.6.3.....
To start using RVM you need to run `source /Users/XXXXXX/.rvm/scripts/rvm`
in all your open shell windows, in rare cases you need to reopen all shell windows.
其中XXXXXX 为本人的电脑账户
通过
source /Users/XXXXXX/.rvm/scripts/rvm
启动rvm
rvm use ruby-2.0
使用ruby
最后执行安装cocoapods 命令
sudo gem install cocoapods
安装成功
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