CocoaPods操作常见问题

1. 运行pod install等命令时，会打印如下提示

Ignoring executable-hooks-1.6.0 because its extensions are not built.  Try: gem pristine executable-hooks --version 1.6.0
Ignoring gem-wrappers-1.4.0 because its extensions are not built.  Try: gem pristine gem-wrappers --version 1.4.0

运行gem pristine --all即可，如果一遍不行，再运行一遍