ionic build iOS 报错，是什么问题？

Question

WilondeMac:CPM Wilon$ cordova platform list
Installed platforms:
  android
  ios
Available platforms:
  android ~6.2.2
  blackberry10 ~3.8.0 (deprecated)
  browser ~4.1.0
  ios ~4.4.0
  osx ~4.0.1
  webos ~3.7.0
{}
WilondeMac:CPM Wilon$ ionic build ios
 Using this version of Cordova with older version of cordova-ios is deprecated. Upgrade to cordova-ios@4.0.0 or newer.


Error: Your ios platform does not have Api.js


WilondeMac:CPM Wilon$