无法获得$翻译从服务的角度，转换来改变ngDropdowns下拉阵列(Can't get $

角转换正在努力改变我的HTML。我为ngDropdown按钮指令，也有改变选择项目的数组。更改语言后，我试图让与translate.use新的/当前的语言（）。东西不起作用。

这里的HTML

<div id="postBox" class="floatingSection" data-ng-controller="postButtonController2">
  <button id="postButton" dropdown-menu="ddMenuOptions" dropdown-model="ddMenuSelected" class="btn-menu" ng-click="getCurrentLanguage()">{{ 'POST' | translate }}</button>
</div>

下面是该postButton控制器。它应该从$翻译并使用该字符串来获得下拉选择数组新的/当前的语言，硬编码时ddSelections.withLangChoice $ scope.getCurrentLanguage选择正确的阵列，而不是在从$获取变量转换为语言的字符串。

这是一个有一个下拉按钮控制器。注释描述工作不上几行的东西和事情。

residenceApp.controller('postButtonController2', ['$translate', '$scope', 'changePostDdFactory',
function ( $translate, $scope, ddSelections ){
//ddSelections is the result object from the function returned by changePostDdFactory
  $scope.getCurrentLanguage = function( $translate ){
    alert('here I am in postButtonController2'); //fires on post button clicks and on page load
    alert('here I am in postButtonController2' + $translate.use()); //does not fire on post button clicks. fires on page load
    $scope.langKey=$translate.use(); //gets langKey in $translate on page load only
    $translate.refresh($scope.langKey);//should refresh the translation, but nothing
    alert('from postButtonController2 - currentLanguage is' + ' ' + $translate.use() ); //does not fire on button click. fires on page load
    //return 'es'; //hardcoded works on page load & sets ddSelections.withLangChoice to es array
    return $translate.use(); //sets language for ddSelections on page load, no language changes
};
$scope.ddMenuOptions = ddSelections.withLangChoice($scope.getCurrentLanguage($translate)); //works on page load, no language change occurs
$scope.ddMenuSelected = {};
//working code to watch for change from user selection
}]);

我是新的，但，在控制器不应$翻译服务工作。假设这是真的，什么也改变发生的变化来获得。我最近增加了NG-点击到HTML的按钮，但它本身也没有任何影响。

我开始怀疑2D在OP最后一行没有被执行。行前执行，它执行的行之后，但警报（）围绕它是奇怪。所以我把里面的功能这一行，和它的工作。下面是修改后，工作代码。

residenceApp.controller('postButtonController2', ['$translate', '$scope',  'changePostDdFactory',
function ( $translate, $scope, ddSelections ){
  var ddSelections;
  //ddSelections is the result object from the function returned by changePostDdFactory
  $scope.getCurrentLanguage = function(){
  $scope.langKey=$translate.use(); //use() as a getter
  $scope.ddMenuOptions = ddSelections.withLangChoice($scope.langKey);
  return;
};
$scope.ddMenuSelected = {};
//code to watch for change from user selection
}]);

我依然困惑不解，为什么$ scope.getCurrentLanguage只能作为一个匿名函数，为什么$ scope.ddMenuOptions必须在函数内部。但它的工作原理，以及它很简单。