Mac升级10.15导致pod报错
第一种问题：-bash: /usr/local/bin/pod: /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/bin/ruby: bad interpreter: No such file or directory
第一种解决：sudo gem install -n /usr/local/bin cocoapods 一定要加-n /usr/local/bin否则会报以下错误
进行上面的操作之后要是还会报错如下：
第二种：是下图
第二种的解决方法是：
在 Mac OS 10.14 版本以下执行：open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
在 Mac OS 10.14 版本以上执行：xcode-select --install 自动弹出一个窗口；然后根据提示xxxxxxx安装完后，再执行：sudo gem install cocoapods
然后192:~XXX$ xcode-select --install
xcode-select: note: install requested for command line developer tools
192:~ XXX$ sudo gem install cocoapods
Building native extensions. This could take a while...
Successfully installed ffi-1.13.1
Successfully installed ethon-0.12.0
Successfully installed typhoeus-1.4.0
Successfully installed netrc-0.11.0.............
等待安装完成提示
rsing documentation for cocoapods-1.9.3
Installing ri documentation for cocoapods-1.9.3
Done installing documentation for ffi, ethon, typhoeus, netrc, cocoapods-core, claide, cocoapods-deintegrate, cocoapods-downloader, cocoapods-plugins, cocoapods-search, cocoapods-stats, cocoapods-trunk, cocoapods-try, molinillo, atomos, colored2, nanaimo, xcodeproj, escape, fourflusher, gh_inspector, ruby-macho, cocoapods after 29 seconds
23 gems installed
最后结束，可以正常使用了
