ionic3打包出错 ionic cordova build ios（系列三）Error: xcodebuild was not found. Please install version 7.0.0 or greater from App Store

1.问题：运行ionic cordova build ios，报错Error: xcodebuild was not found. Please install version 7.0.0 or greater from App Store

2.问题原因：是不能在window系统编译ios，在window上可使用云编译器执行打包ios