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

你也可以使用active-link指令https://stackoverflow.com/a/23138152/1387163

当location匹配/url时,父类li将获得活动类:

<li>
    <a href="#!/url" active-link active-link-parent>
</li>

其他回答

如果你不愿意使用AngularStrap,那么这个指令可以帮到你!这是对https://stackoverflow.com/a/16231859/910764的修改。

JavaScript

angular.module('myApp').directive('bsNavbar', ['$location', function ($location) {
  return {
    restrict: 'A',
    link: function postLink(scope, element) {
      scope.$watch(function () {
        return $location.path();
      }, function (path) {
        angular.forEach(element.children(), (function (li) {
          var $li = angular.element(li),
            regex = new RegExp('^' + $li.attr('data-match-route') + '$', 'i'),
            isActive = regex.test(path);
          $li.toggleClass('active', isActive);
        }));
      });
    }
  };
}]);

HTML

<ul class="nav navbar-nav" bs-navbar>
  <li data-match-route="/home"><a href="#/home">Home</a></li>
  <li data-match-route="/about"><a href="#/about">About</a></li>
</ul>

注意:上面的HTML类假设您正在使用Bootstrap 3.x

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>

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。

你可以看看AngularStrap,它的导航条指令似乎就是你要找的:

https://github.com/mgcrea/angular-strap/blob/master/src/navbar/navbar.js

.directive('bsNavbar', function($location) {
  'use strict';

  return {
    restrict: 'A',
    link: function postLink(scope, element, attrs, controller) {
      // Watch for the $location
      scope.$watch(function() {
        return $location.path();
      }, function(newValue, oldValue) {

        $('li[data-match-route]', element).each(function(k, li) {
          var $li = angular.element(li),
            // data('match-rout') does not work with dynamic attributes
            pattern = $li.attr('data-match-route'),
            regexp = new RegExp('^' + pattern + '$', ['i']);

          if(regexp.test(newValue)) {
            $li.addClass('active');
          } else {
            $li.removeClass('active');
          }

        });
      });
    }
  };
});

使用这个指令:

从http://mgcrea.github.io/angular-strap/下载AngularStrap 包括脚本在你的页面bootstrap.js之后: < script src = " lib / angular-strap.js " > < /脚本> 添加指令到你的模块: 角。模块(“myApp”,[' strap.directives美元']) 添加指令到你的导航栏: <div class="navbar" b -navbar> 在每个导航项上添加正则表达式: <李data-match-route = " / " > < a href = " # /约" >对< / > < /李>

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');   
                };
            });     
        });
    }
}
}]);