ffi 问题

问题说明 :
Ignoring ffi-1.12.2 because its extensions are not built. Try: gem pristine ffi —version 1.12.2

解决方案 : 

  1. $ gem install cocoapods-core
  2. Successfully installed cocoapods-core-1.10.1
  3. Parsing documentation for cocoapods-core-1.10.1