如果我有一个导航栏在引导项目

Home | About | Contact

当每个菜单项处于活动状态时,如何为它们设置活动类?也就是说,当角路由为at时,我如何设置class="active"

#/ home #/about用于about页面 #/contact为联系人页面


当前回答

我刚刚写了一个指令来处理这个问题,所以你可以简单地将属性bs-active-link添加到父元素<ul>,任何时候路由发生变化,它都会找到匹配的链接,并将活动类添加到相应的<li>。

你可以在这里看到它的运行:http://jsfiddle.net/8mcedv3b/

示例HTML:

<ul class="nav navbar-nav" bs-active-link>
  <li><a href="/home">Home</a></li>
  <li><a href="/contact">Contact</a></li>
</ul>

Javascript:

angular.module('appName')
.directive('bsActiveLink', ['$location', function ($location) {
return {
    restrict: 'A', //use as attribute 
    replace: false,
    link: function (scope, elem) {
        //after the route has changed
        scope.$on("$routeChangeSuccess", function () {
            var hrefs = ['/#' + $location.path(),
                         '#' + $location.path(), //html5: false
                         $location.path()]; //html5: true
            angular.forEach(elem.find('a'), function (a) {
                a = angular.element(a);
                if (-1 !== hrefs.indexOf(a.attr('href'))) {
                    a.parent().addClass('active');
                } else {
                    a.parent().removeClass('active');   
                };
            });     
        });
    }
}
}]);

其他回答

首先,这个问题可以用很多方法来解决。这种方式可能不是最优雅的,但它确实有效。

这里有一个简单的解决方案,你应该能够添加到任何项目。当你配置你的路由时,你可以添加一个“pageKey”或其他属性,你可以用它来关闭。另外,你可以在$route对象的$routeChangeSuccess方法上实现一个监听器来监听路由更改是否成功完成。

当您的处理程序触发时,您将获得页面键,并使用该键来定位需要为该页“ACTIVE”的元素,然后应用ACTIVE类。

Keep in mind you need a way to make ALL the elements "IN ACTIVE". As you can see i'm using the .pageKey class on my nav items to turn them all off, and I'm using the .pageKey_{PAGEKEY} to individually turn them on. Switching them all to inactive, would be considered a naive approach, potentially you'd get better performance by using the previous route to make only active items inactive, or you could alter the jquery selector to only select active items to be made inactive. Using jquery to select all active items is probably the best solution because it ensures everything is cleaned up for the current route in case of any css bugs that might have been present on the previous route.

这意味着要修改这行代码:

$(".pagekey").toggleClass("active", false);

到这个

$(".active").toggleClass("active", false);

下面是一些示例代码:

给出一个引导导航条

<div class="navbar navbar-inverse">
    <div class="navbar-inner">
        <a class="brand" href="#">Title</a>
        <ul class="nav">
            <li><a href="#!/" class="pagekey pagekey_HOME">Home</a></li>
            <li><a href="#!/page1/create" class="pagekey pagekey_CREATE">Page 1 Create</a></li>
            <li><a href="#!/page1/edit/1" class="pagekey pagekey_EDIT">Page 1 Edit</a></li>
            <li><a href="#!/page1/published/1" class="pagekey pagekey_PUBLISH">Page 1 Published</a></li>
        </ul>
    </div>
</div>

以及一个角模块和控制器,如下所示:

<script type="text/javascript">

    function Ctrl($scope, $http, $routeParams, $location, $route) {

    }



    angular.module('BookingFormBuilder', []).
        config(function ($routeProvider, $locationProvider) {
            $routeProvider.
                when('/', { 
                   template: 'I\'m on the home page', 
                   controller: Ctrl, 
                   pageKey: 'HOME' }).
                when('/page1/create', { 
                   template: 'I\'m on page 1 create', 
                   controller: Ctrl, 
                   pageKey: 'CREATE' }).
                when('/page1/edit/:id', { 
                   template: 'I\'m on page 1 edit {id}', 
                   controller: Ctrl, pageKey: 'EDIT' }).
                when('/page1/published/:id', { 
                   template: 'I\'m on page 1 publish {id}', 
                   controller: Ctrl, pageKey: 'PUBLISH' }).
                otherwise({ redirectTo: '/' });

            $locationProvider.hashPrefix("!");
        }).run(function ($rootScope, $http, $route) {

            $rootScope.$on("$routeChangeSuccess", 
                           function (angularEvent, 
                                     currentRoute,
                                     previousRoute) {

                var pageKey = currentRoute.pageKey;
                $(".pagekey").toggleClass("active", false);
                $(".pagekey_" + pageKey).toggleClass("active", true);
            });

        });

</script>

我使用ng-class指令和$location来实现它。

<ul class="nav">
<li data-ng-class="{active: ($location.path() == '/') }">
    <a href="#/">Carpeta Amarilla</a>
</li>
<li class="dropdown" data-ng-class="{active: ($location.path() == '/auditoria' || $location.path() == '/auditoria/todos') }">
    <a class="dropdown-toggle" data-toggle="dropdown" href="#">
        Auditoria
        <b class="caret"></b>
    </a>
    <ul class="dropdown-menu pull-right">
        <li data-ng-class="{active: ($location.path() == '/auditoria') }">
            <a href="#/auditoria">Por Legajo</a>
        </li>
        <li data-ng-class="{active: ($location.path() == '/auditoria/todos') }">
            <a href="#/auditoria/todos">General</a>
        </li>
    </ul>
</li>
</ul>

它要求导航条在一个主控制器中,可以像这样访问$location服务:

bajasApp.controller('MenuCntl', ['$scope','$route', '$routeParams', '$location', 
   function MenuCntl($scope, $route, $routeParams, $location) {
   $scope.$route = $route;
   $scope.$location = $location;
   $scope.$routeParams = $routeParams;
}]);

我刚刚写了一个指令来处理这个问题,所以你可以简单地将属性bs-active-link添加到父元素<ul>,任何时候路由发生变化,它都会找到匹配的链接,并将活动类添加到相应的<li>。

你可以在这里看到它的运行:http://jsfiddle.net/8mcedv3b/

示例HTML:

<ul class="nav navbar-nav" bs-active-link>
  <li><a href="/home">Home</a></li>
  <li><a href="/contact">Contact</a></li>
</ul>

Javascript:

angular.module('appName')
.directive('bsActiveLink', ['$location', function ($location) {
return {
    restrict: 'A', //use as attribute 
    replace: false,
    link: function (scope, elem) {
        //after the route has changed
        scope.$on("$routeChangeSuccess", function () {
            var hrefs = ['/#' + $location.path(),
                         '#' + $location.path(), //html5: false
                         $location.path()]; //html5: true
            angular.forEach(elem.find('a'), function (a) {
                a = angular.element(a);
                if (-1 !== hrefs.indexOf(a.attr('href'))) {
                    a.parent().addClass('active');
                } else {
                    a.parent().removeClass('active');   
                };
            });     
        });
    }
}
}]);

以下是我的看法。在这篇文章中找到了一些答案的组合。我有一个稍微不同的情况下,所以我的解决方案涉及到分离菜单到自己的模板,在指令定义Ojbect中使用,然后添加我的导航栏到我需要它的页面。基本上,我有一个登录页面,我不想包括我的菜单,所以我使用ngInclude并在登录时插入这个指令:

指令:

module.directive('compModal', function(){


return {
    restrict: 'E',
    replace: true,
    transclude: true,
    scope: true,
    templateUrl: 'templates/menu.html',
    controller: function($scope, $element, $location){
        $scope.isActive = function(viewLocation){

            var active = false;

            if(viewLocation === $location.path()){
                active = true;
            }

            return active;

        }
    }
 }
});

指令模板(templates/menu.html)

<ul class="nav navbar-nav">
  <li ng-class="{ active: isActive('/View1') }"><a href="#/View1">View 1</a></li>
  <li ng-class="{ active: isActive('/View2') }"><a href="#/View2">View 2</a></li>
  <li ng-class="{ active: isActive('/View3') }"><a href="#/View3">View 3</a></li>
</ul>

包含指令的HTML

<comp-navbar/>

希望这能有所帮助

结合@Olivier的AngularStrap回答,我也实现了kevinknelson的回答:https://github.com/twbs/bootstrap/issues/9013。

Bootstrap3导航栏本来就不是为单页面(比如Angular)应用设计的,因此当菜单在小屏幕上时,点击时不会崩溃。