Invalid `Podfile` file: undefined method `exists?' for File:Class

应该是cocoapods版本问题

gem cleanup
brew uninstall cocoapods
sudo gem uninstall cocoapods
sudo gem install cocoapods -v 1.10.0 -n /usr/local/bin  
sudo gem install cocoapods-user-defined-build-types
pod install --repo-update

原文地址 stackoverflow.com/questions/7…