pod install 时报错 Error "Pull is not possible because you have unmerged files."  

解决办法： rm -rf ~/.cocoapods/

 

相关链接：https://github.com/CocoaPods/Specs/issues/1268

　　　　　http://stackoverflow.com/questions/21534309/cocoapods-error-pull-is-not-possible-because-you-have-unmerged-files