安装ios-deploy时，终端构建失败：
ios-deploy是一个从mac电脑把app打包到手机的工具
安装：sudo npm install -g ios-deploy –unsafe-perm=true

安装出现问题：
** BUILD FAILED **
The following build commands failed:
CompileC /usr/local/lib/node_modules/ios-deploy/build/ios-deploy.build/Release/ios-deploy-lib.build/Objects-normal/x86_64/libios_deploy.o /usr/local/lib/node_modules/ios-deploy/src/ios-deploy-lib/libios_deploy.m normal x86_64 objective-c com.apple.compilers.llvm.clang.1_0.compiler
(1 failure)
npm ERR! code ELIFECYCLE
npm ERR! errno 65
npm ERR! [email protected] preinstall: ./src/scripts/check_reqs.js && xcodebuild`
npm ERR! Exit status 65
npm ERR!
npm ERR! Failed at the [email protected] preinstall script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

解决方式：
需要把macOS，ios，xcode版本号升级为一致，因为用命令安装的时候默认安装*新的ios-deploy，而电脑的配置不相符：

升级之后执行
终端运行：sudo xcode-select –switch /Applications/Xcode.app/Contents/Developer
在执行：sudo npm install -g ios-deploy –unsafe-perm=true
open /Applications/Xcode.app/Contents/Developer

安装成功