我想有一个白手起家导航栏的显示，并从一个角度控制器中删除HTML元素被告上的数据。

I'm trying to have a bootstraps navbar display and remove html elements defendant on data from an angular controller.

我有以下的玉code：

I have the following jade code:

div.navbar.navbar-fixed-top
    div.navbar-inner
        div.container-fluid(data-ng-controller="NavCtrl")

            a.btn.btn-navbar(data-toggle='collapse', data-target='.nav-collapse')
                span.icon-bar
                span.icon-bar
                span.icon-bar

            div.nav-collapse.collapse
                ul.nav
                    li  
                        a(href='/topics') Topics
                    li(ng-show="curUser.admin")
                        a(href='/users') Users
                    li(ng-show="curUser.admin")
                        a(href='/organizations') Organizations
                    li(ng-show="curUser.admin")
                        a(href='/topicConfs') TopicConfig
                    li.divider
                ul.nav.pull-right
                    {{authenticated}}
                    li.dropdown(ng-show="authenticated")
                        a.dropdown-toggle(role='button', data-toggle='dropdown', href='#') {{curUser.email}}
                            b.caret
                        ul.dropdown-menu(role='menu')
                            li
                                a(href='/users/{{curUser._id}}') Profile
                            li.divider
                            li
                                a.btn(ng-click="logout()") Logout 

和具有以下控制器：

function NavCtrl($location, $scope, $rootScope, CurrentUser){
  $scope.curUser = CurrentUser.getUser()
  $scope.authenticated = CurrentUser.isAuthenticated()

  $rootScope.$on('$routeChangeStart', function(){
    $scope.curUser = CurrentUser.getUser()
    $scope.authenticated = CurrentUser.isAuthenticated()
  })


  $scope.logout = function(){
    CurrentUser.logout(function(result){
      $scope.curUser = CurrentUser.getUser()
      $scope.authenticated = CurrentUser.isAuthenticated()
      console.log("authenticated before logout is %j", $scope.authenticated)

      $location.url('/')
    })
  }
}

一切，直到 $ scope.authenticated 设置为假和 $正确显示scope.user 设置为 {} ，其中没有NG-显示属性中的导航栏被更新。

Everything displays properly until the $scope.authenticated is set to false and $scope.user is set to {} where none of the ng-show attributes are updated in the nav-bar.

什么我需要做的，有白手起家的导航元素在 $范围变化作出响应变量？

What do I need to do to have the bootstraps nav elements respond to the change in the $scope variables?

推荐答案

在角$作用域属性更改外部的角度， $范围。$适用（）需要调用导致角进入其消化循环。被投射到当前视图的任何属性将有$手表，其循环消化将评估。当在这些$手表中的一个检测到的改变，该视图被更新。

When Angular $scope properties are changed "outside" of Angular, $scope.$apply() needs to be called to cause Angular to enter its digest loop. Any properties that are projected onto the current view will have $watches, which the digest loop will evaluate. When a change is detected in one of these $watches, the view is updated.

的例子的角外：

浏览器事件回调。例如，搜索 element.bind（'someEvent'，函数（）{结果＆NBSP;＆NBSP;＆NBSP; //需要调用范围。$适用于此处结果}） 第三方插件回调。例如，回调传递给注销以上。第三方AJAX回调。第三方承诺。 Browser event callback. E.g., element.bind('someEvent', function() { //need to call scope.$apply in here }) Third-party plugin callback. E.g., the callback passed to logout above. Third-party AJAX callback. Third-party promise.