1、gem sources --add https://gems.ruby-china.com/
出现
ERROR: While executing gem ... (Gem::Exception) Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
当:pod install
解决：重装rvm
借鉴：https://stackoverflow.com/questions/37336573/unable-to-require-openssl-install-openssl-and-rebuild-ruby-preferred-or-use-n
2、rvm reinstall 2.3.0 --with-openssl-dir=/usr/local/opt/openssl
出现错误
/usr/local/Cellar/ruby/2.4.0/lib/ruby/2.4.0/rubygems.rb:270:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) (Gem::GemNotFoundException)
from /usr/local/Cellar/ruby/2.4.0/lib/ruby/2.4.0/rubygems.rb:298:in `activate_bin_path'
from /usr/local/bin/pod:22:in `main'原因：卸载cocoapods，并没有安装
3、将“podfile”、“podfile.lock”、“Pods”、“XXX.xcworkspace”以及“XXX.xcodeproj”包文件“project.xcworkspace”删除，重新pod install之后，工程编译出现报错：no such file or directory: '/Users/pengzhiyao/Desktop/WorkerBee/Pods/XXX'
解决：sudo pod install
借鉴：https://www.cnblogs.com/chuange-Strongload/p/5891903.html
