我在Angular应用程序中使用ui.router
进行路由。有一个典型的登录场景,如果用户没有登录,我会将其重定向到登录url。在没有ui.router库的情况下,使用$routeChangeStart事件和$location.path
可以很好地执行此操作。现在,我正在使用$stateChangeStart
事件,并将其与$state.go
相结合,什么都不起作用!它还将我的浏览器发送到一个无限循环中。我从其他来源了解到这是一个已知的错误,建议的解决方案都不适用于我。此外,$location.path
也不会重定向到登录页面。
这就是我配置路径的方式:
.config(['$stateProvider', '$urlRouterProvider', function ($stateProvider, $urlRouterProvider) {
$stateProvider
.state('main', {
url: '/',
templateUrl: 'views/main.html',
controller: 'MainCtrl'
})
.state('about', {
url: '/about',
templateUrl: 'views/about.html',
controller: 'AboutCtrl'
})
.state('login', {
url: '/login',
templateUrl: 'views/loginform.html',
controller: 'LoginCtrl'
});
$urlRouterProvider.otherwise("/");
}])
我的run
方法:
.run(['$state', '$rootScope', '$location', function($state, $rootScope, $location) {
//Check when routing starts
//event, next, current
$rootScope.$on( '$stateChangeStart', function(e, toState, toParams, fromState, fromParams) {
//Redirect to login if the user is not logged in
if (!isUserLoggedIn) {
//Some suggestion
//e.preventDefault();
console.log('Not logged in');
//Infinite loop, kills my browser!
$state.go('login');
$state.transitionTo('login');
//Some suggestion
$state.go('login', { url: '/login'});
//Doesn't work
$location.path('/login');
//$location.path( $state.href('login');
console.log('Redirected');
}
});
这里我们需要的是,如果状态to已经是"login",则不要重定向。
只是一个起草的调整将是
$rootScope.$on( '$stateChangeStart', function(e, toState , toParams
, fromState, fromParams) {
var isLogin = toState.name === "login";
if(isLogin){
return; // no need to redirect anymore
}
...
而且,我们应该用event.preventDefault();
调用$state.go('login');
...
// also prevent default on redirect
$state.go('login');
event.preventDefault();
...
请查看此问答;A如何修复';超过了最大调用堆栈大小';AngularJS和一个具有类似解决方案
我使用了类似的东西:
MyApp.run(['$rootScope', '$state', function ($rootScope, $state) {
// The event
$rootScope.$on('$stateChangeStart', function (e, toState, toParams, fromState, fromParams) {
// Is user already logged in?
var isUserLoggedIn = $rootScope.isUserLoggedIn();
if (isUserLoggedIn) {
// don't let user visit login state, he's already logged in.
$state.go('home');
// preventDefault as described in @radim's answer
e.preventDefault();
} else if (toState.name === "login") {
// user is not logged in and is not going to login state right now, send him there first.
$state.go('login');
// preventDefault as described in @radim's answer
e.preventDefault();
}
});
}]);