注入控制器时服务未定义

Question

我有一个控制器，我已经将一个工厂注入其中，但是当我对该工厂调用一个方法时，它返回为未定义。不确定我在这里做错了什么。任何帮助将不胜感激。

工厂：

(function(){
    'use strict';

    // Declare factory and add it 'HomeAutomation' namespace.
    angular.module('HomeAutomation').factory('AuthenticationService', ['$http','$localStorage', '$window', function($http, $localStorage, $window){
    var service = {};


    service.login = Login;
    service.logout = Logout;
    service.parseJWT = parseJWT;
    service.loginStatus = loginStatus;

    return service;


    function Login(email, password, callback){
        $http.post('api/user/login', {email: email, password: password})
            .success(function(res){
                // Login successful if there is a token in the response.
                if(res.token){
                    // store username and token in local storage to keep user logged in between page refreshes
                    $localStorage.currentUser = { email: email, token: res.token };

                    // add jwt token to auth header for all requests made by the $http service
                    $http.defaults.headers.common.Authorization = 'Bearer ' + res.token;

                    callback(true);
                }else{
                    callback(res);
                }
            }).error(function(err){
            console.log(err);
        });
    }

    function Logout(){
        $localStorage.currrntUser
    }

    function parseJWT(token){
        var base64URL, base64;

        base64URL = token.split('.')[1];
        base64 = base64URL.replace('-', '+').replace('_', '/');

        console.log(JSON.parse($window.atob(base64)));
    }

    function loginStatus(){
        if($localStorage.currentUser){
            return true;
        }else{
            return false;
        }
    }
}]);}());

控制器：

(function(){
angular.module('HomeAutomation')
    .controller('loginController', ['$scope', '$location', 'AuthenticationService', function($scope, $location, $localStorage, AuthenticationService){
        $scope.isLoggedIn = AuthenticationService.logout();

        $scope.logUserIn = function(){
            AuthenticationService.login($scope.login.email, $scope.login.password, function(result){
                if(result === true){
                    $location.path('/');
                }else{
                    console.log(result);
                }
            });
        };

        $scope.logUserOut = function(){
            AuthenticationService.logOut();
        }
    }]);}());

这是导致错误的行：

$scope.isLoggedIn = AuthenticationService.logout();

显然 "AuthenticationService" 未定义。不知道为什么。

提前致谢。

Answer 1

你弄乱了依赖序列，你需要从控制器工厂函数中删除 $localStorage，因为 $localStorage 没有在控制器中的任何地方使用并且没有注入 DI 数组。

.controller('loginController', ['$scope', '$location', 'AuthenticationService', 
    function($scope, $location, AuthenticationService){
                //^^^^^^^^^^removed $localStorage dependency from here

NOTE: Always make sure when you inject any dependency in DI array, they should used in same sequence in controller function

Answer 2

注入不好：

.controller('loginController', ['$scope', '$location', 'AuthenticationService', function($scope, $location, $localStorage, AuthenticationService){

试试这个：

.controller('loginController', ['$scope', '$location', '$localStorage', 'AuthenticationService', function($scope, $location, $localStorage, AuthenticationService){

我不知道你使用的是哪个生成器，但是例如 Gulp，你可以使用 gulp-ng-annotate 来完成这项工作，这样你就可以只写 :

.controller('loginController', function($scope, $location, $localStorage, AuthenticationService){

没有数组。 ng-annotate 会处理剩下的事情。

注入控制器时服务未定义

Service undefined when injected into controller

javascript

angularjs

dependency-injection

angularjs-controller

angularjs-factory