Uncaught Error: [$injector:unpr] Unknown provider: $localstorageProvider <- $localstorage

我的app.js代码：

angular.module('starter',['ionic','starter.controllers','starter.services'])

.run(function($ionicPlatform,$localstorage) {
  $ionicPlatform.ready(function() {
    // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
    // for form inputs)
    if(window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
    }
    if(window.StatusBar) {
      // org.apache.cordova.statusbar required
      StatusBar.styleDefault();
    }

    $localstorage.set('name','Ian');
    console.log($localstorage.get('name'));
  });
})

和services.js：

angular.module('starter.services',[])

.factory('localstorage',['$window',function($window) {
  return {
    set: function(key,value) {
      $window.localStorage[key] = value;
    },get: function(key,defaultValue) {
      return $window.localStorage[key] || defaultValue;
    },setObject: function(key,value) {
      $window.localStorage[key] = JSON.stringify(value);
    },getObject: function(key) {
      return JSON.parse($window.localStorage[key] || '{}');
    }
  }
}]);

不知道我在这里缺少什么.

编辑：如果我将我的app.js代码更改为以下代码,它按预期工作：

angular.module('starter',$localstorage) {
  $ionicPlatform.ready(function() {
    // Hide the accessory bar by default (remove this to show the accessory bar above the keyboard
    // for form inputs)
    if(window.cordova && window.cordova.plugins.Keyboard) {
      cordova.plugins.Keyboard.hideKeyboardAccessoryBar(true);
    }
    if(window.StatusBar) {
      // org.apache.cordova.statusbar required
      StatusBar.styleDefault();
    }

    window.localStorage.setItem('name','Ian');
    console.log(window.localStorage.getItem('name'));

  });
})