Unknown Provider when adding service to controller

问题

I created a Modal service and when I injected the service into the controller, I am receiving an error that says "$Injector: unpr Unknown Provider". Here is my code below. Let me know if I am missing something.

This is the service I have so far.

'use strict';

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

.factory('modalService', ['$scope', function($scope) {
return {
    openMenuModal: function(templateLink, windowAnimation) {
        var modalInstance = $modal.open({
            templateUrl: templateLink,
            backdrop: 'static',
            windowClass: windowAnimation,
            controller: function($scope, $modalInstance) {
                $scope.close = function() {
                    $modalInstance.close();
                };
            },
            size: 'md',
            scope: $scope,
            keyboard: true
        });

    }
};

}]);

Here is the controller I have set up.

angular.module('myApp.controllers', ['ui.bootstrap', 'ngAnimate'])
.controller('HomeCtrl', function($scope, $http, $modal, modalService) {
    $scope.opentheBook = modalService.openMenuModal('partials/Books.html', 'animated zoomIn');
});

Here is the template for the data in the modal - Books.html

<div ng-controller="HomeCtrl">
<div class="modalBox animated fadeIn">
<button class="btn btn-danger pull-right" type="button" ng-click="" tooltip="Close"><i class="fa fa-times"></i></button>
<h1>title</h1>
<p>description</p>
<div class="next">
<button class="btn btn-danger pull-right" type="button" tooltip="Close"><i class="fa fa-times"></i></button>
            </div>
        </div>
    </div>

Here is the main home page where I am calling the openBook() to open the modal with the info from the json

    <div class="Books">
                  <ul>
                    <li ng-repeat="book in thing.Books" class="list-unstyled"><a ng-click="opentheBook" href="#"><h6>{{book.name}}</h6></a></li>
                   </ul>
            </div>

json for Books example --inside another array called things

"Books": [
            {
                "name": "Name of Book 1",
                "description": "Description about book..."
            },
            {
                "name": "Name of Book 2",
                "description": "Description about book..."
            }
        ]

回答1:

This error results from the $injector being unable to resolve a required dependency. To fix this, make sure the dependency is defined and spelled correctly. For example, the following code will fail with the same error you received -$injector:unpr, if myService is not defined:

angular.module('myApp', [])
.controller('MyController', ['myService', function (myService) {
  // Do something with myService
}]);

Making sure each dependency is defined will fix the problem, as noted below.

angular.module('myApp', [])
.service('myService', function () { /* ... */ })
.controller('MyController', ['myService', function (myService) {
  // Do something with myService
}]);

So to answer your question, in your case you appear to be missing dependency

angular.module('myApp.controllers', ['ui.bootstrap', 'ngAnimate'])
.controller('HomeCtrl', function($scope, $http, $modal, modalService) {
    $scope.opentheBook = modalService.openMenuModal('partials/Books.html', 'animated zoomIn');
});

To Inject modalService like so:

.controller('HomeCtrl', ['modalService', function($scope, $http, $modal, modalService) {

    }]);

You also need to change up your factory module to angular.module('myApp.services', ['ui.bootstrap']) and use $uibModal since $modal is deprecated.

angular.module('myApp', ['ui.bootstrap'])

.factory('modalService', ['$uibModal', function($uibModal) {

  return {
    openMenuModal: function(templateLink, windowAnimation) {

        var modalObj = $uibModal.open({
            templateUrl: templateLink,
            backdrop: 'static',
            windowClass: windowAnimation,
            controller: function($scope,$modalInstance){
              $scope.ok = function(id){
                //Process OK Button Click
                 $modalInstance.close(); 
              },
               $scope.cancel = function(){
                $modalInstance.dismiss('cancel');
              }
            },
            size: 'md',
            keyboard: true,
            resolve: {
              someData: function () {
                return 'Return some Data';
              }
          }
        });
    }
};
}])

.controller('HomeCtrl', ['$scope','modalService', function($scope, modalService, someData) {
   $scope.dataFromService = someData;
   $scope.opentheBook = function(){
      modalService.openMenuModal('myModalContent.html', 'animated zoomIn');
    };
}]);

UPDATE 1

As mentioned in the comments, do not attempt to inject $scope to your factory. Here is a Plunker I created which lets you open a modal by calling the factory.

http://plnkr.co/edit/G68NVYZlTqrIS0N2TKL4

来源：https://stackoverflow.com/questions/33130642/unknown-provider-when-adding-service-to-controller