Error: [ng:areq] Argument ‘AppCtrl’ is not a function, got undefined

今天把用ionic做一個案例，和ionic示例項目差不多，只是用requirejs分離了controller，但是一直報錯

Error: [ng:areq] Argument ‘AppCtrl’ is not a function, got undefined

define(function (require) {
  'use strict';
  var controllers = angular.module('starter.controllers', []);
  controllers.controller('appCtrl',require('controllers/appController'));
  controllers.controller('dashCtrl',require('controllers/dashController'));
  controllers.controller('gameCtrl',require('controllers/gameController'));
  controllers.controller('meCtrl',require('controllers/meController'));
  controllers.controller('infoCtrl',require('controllers/infoController'));
  controllers.controller('playListCtrl',require('controllers/playListController'));return controllers;
});

經過一番折騰還是沒能解決。後來我細分析，我的控制器叫appCtrl，錯誤信息中怎麼是AppCtrl，我試著將名稱首字母大寫，卧槽，居然通過了

define(function (require) {
  'use strict';
  var controllers = angular.module('starter.controllers', []);
  controllers.controller('AppCtrl',require('controllers/appController'));
  controllers.controller('DashCtrl',require('controllers/dashController'));
  controllers.controller('GameCtrl',require('controllers/gameController'));
  controllers.controller('MeCtrl',require('controllers/meController'));
  controllers.controller('InfoCtrl',require('controllers/infoController'));
  controllers.controller('PlayListCtrl',require('controllers/playListController'));
  return controllers;
});

再在網上搜，原來 ionic 的 ui-router 是大小寫敏感，這裡定義的控制器名要與路由中定義的控制器名大小寫一致