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

今天把用ionic做一个案例，和ionic示例项目差不多，只是用requirejs分离了controller，但是一直报错

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;
});

经过一番折腾还是没能解决。后来我细分析，我的控制器叫appCtrl，错误信息中怎么是AppCtrl，我试着将名称首字母大写，卧槽，居然通过了

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;
});

再在网上搜，原来 ionic 的 ui-router 是大小写敏感，这里定义的控制器名要与路由中定义的控制器名大小写一致