描述：
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: SDK "iphoneos" cannot be located
xcrun: error: unable to lookup item 'Path' in SDK 'iphoneos'
/Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70/missing: Unknown `--is-lightweight' option Try `/Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70/missing
--help' for more information
configure: WARNING: 'missing' script is too old or missing
configure: error: in `/Users/henry/Library/Caches/CocoaPods/Pods/External/GLog/1bdd977745f69be933366dc3ed8fb579-a1d70': configure: error: C compiler cannot create executables See `config.log' for more details
解决：
在终端中执行
sudo xcode-select --switch /Applications/Xcode.app
