我有 4 个状态:dashboard、dahboard.main、dashboard.minor、login.仪表板是抽象的，它是 .minor 和 .main 状态的父状态.以下是我的代码:

I have 4 states: dashboard, dahboard.main, dashboard.minor, login. dashboard is abstract and it is a parent state for .minor and .main states. Below is my code:

.state('dashboard', {
        url: "/dashboard",
        abstract: true,
        templateUrl: "views/dashboard.html",
        resolve: {
            auth: function ($q, authenticationSvc) {
                var userInfo = authenticationSvc.getUserInfo();
                if (userInfo) {
                    return $q.when(userInfo);
                } else {
                    return $q.reject({ authenticated: false });
                }
            }
        },
        controller: "DashboardCtrl",
        data: { pageTitle: 'Example view' }
    })
    .state('dashboard.main', {
        url: "",
        templateUrl: "views/main.html",
        controller: "DashboardCtrl",
        data: { pageTitle: 'Main view' }
    })

正如您在仪表板状态中看到的，我有解决选项.通过这个，如果他没有被授权，我想将用户重定向到登录页面.出于这个原因，我使用特殊的 authenticationSvc 服务:

As you see in dashboard state I have resolve option. By this I would like to redirect user to login page if he is not authorized. For this reason I use special authenticationSvc service:

.factory("authenticationSvc", ["$http", "$q", "$window", function ($http, $q, $window) {
    var userInfo;

    function login(email, password) {
        var deferred = $q.defer();

        $http.post("/api/login", { email: email, password: password })
            .then(function (result) {
                if(result.data.error == 0) {
                    userInfo = {
                        accessToken: result.data.accessToken
                    };
                    $window.sessionStorage["userInfo"] = JSON.stringify(userInfo);
                    deferred.resolve(userInfo);
                }
                else {
                    deferred.reject(error);
                }
            }, function (error) {
                deferred.reject(error);
            });

        return deferred.promise;
    }
    function getUserInfo() {
        return userInfo;
    }
    return {
        login: login,
        logout: logout,
        getUserInfo: getUserInfo
    };
}]);

我在 config 中检查 auth 值:

I check auth value in config :

.run(function($rootScope, $location, $state) {
    $rootScope.$state = $state;
    $rootScope.$on("routeChangeSuccess", function(userInfo) {
        consol.log(userInfo);
    });
    $rootScope.$on("routeChangeError", function(event, current, previous, eventObj) {
        if(eventObj.authenticated === false) {
            $state.go('login');
        }
    });
});

但不幸的是，当我转到我的网站根目录或仪表板状态时，我得到一个空白页面.这段代码有什么问题?谢谢！

But unfortunately when I go to my website root or dashboard state I get an empty page. What is wrong with this code? Thanks!

推荐答案

关键是，如果不需要就不要重定向 === 如果已经重定向到预期状态.有 一个工作的 plunker 具有类似的解决方案

The point is, do not redirect if not needed === if already redirected to intended state. There is a working plunker with similar solution

.run(function($rootScope, $location, $state, authenticationSvc) {


    $rootScope.$on( '$stateChangeStart', function(e, toState  , toParams
                                                   , fromState, fromParams) {

        var isLogin = toState.name === "login";
        if(isLogin){
           return; // no need to redirect 
        }

        // now, redirect only not authenticated

        var userInfo = authenticationSvc.getUserInfo();

        if(userInfo.authenticated === false) {
            e.preventDefault(); // stop current execution
            $state.go('login'); // go to login
        }
    });
});

检查这些以获得类似的解释:

Check these for similar explanation: