When I perform sudo gem install cocoapods it returns the following:
Building native extensions. This could take a while...
ERROR: Error installing cocoapods:
ERROR: Failed to build gem native extension.
current directory: /Library/Ruby/Gems/2.6.0/gems/ffi-1.12.2/ext/ffi_c
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20200524-27428-t6f6h6.rb extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/include/ruby.h
You might have to install separate package for the ruby development
environment, ruby-dev or ruby-devel for example.
extconf failed, exit code 1
Gem files will remain installed in /Library/Ruby/Gems/2.6.0/gems/ffi-1.12.2 for inspection.
Results logged to /Library/Ruby/Gems/2.6.0/extensions/universal-darwin-19/2.6.0/ffi-1.12.2/gem_make.out
知道是什么问题吗？
First install Homebrew if you don't have it: https://brew.sh/index_pt-br
Second, install ruby if you don't have it: https://www.ruby-lang.org/pt/documentation/installation/
You can also follow these steps: https://gist.github.com/monicao/d372716cdfbb7e9cf692
然后，关闭您的终端，然后重新打开。
始终使用sudo安装cocoapods：
Also, you need to install Xcode's developer tools. The easiest way to do this is through terminal (this question)