xcodebuild was not found. Please install version 9.0.0 or greater from App Store

报错信息：

add to body class: platform-ios CordovaError: Promise rejected with non-error: 'xcodebuild was not found. Please install version 9.0.0 or greater from App Store'

解决办法：请使用苹果电脑执行ionic cordova build ios命令，windows电脑执行这个命令就会报以上错误信息。