javascript - 如何通过Angular的ng-init传递的Id获取html元素

当我使用ng-click时，可以通过id获得html的元素，但是使用ng-init时，我会得到null。请检查我的笔http://codepen.io/solidet/pen/pbJMjq

html

<script type="text/javascript">
    var memId = "bb7de28f-0f89-4f14-8575-d494203acec7";
</script>

<div  ng-app="myapp" ng-controller="MainCtrl" ng-init="getMember(memId)">
    <span id="audio-{{memId}}">
        Your mem ID: {{memId}}
    </span>
    <span ng-click="getMember(memId)"> click me <span>
</div>

Controller

var app = angular.module('myapp', []);

app.controller('MainCtrl', ['$scope', '$window', function($scope, $window) {
  $scope.memId = $window.memId;

  $scope.getMember = function(id) {
    console.log(id);
    var voice = document.getElementById('audio-'+ id);
    console.log(voice);
  };
}]);

最佳答案

您可以通过 Angular $ timeout来获取它，该方法要等到 Angular 循环结束并且元素已呈现 Controller

var app = angular.module('myapp', []);

app.controller('MainCtrl', ['$scope', '$window', '$timeout', function($scope, $window, $timeout) {
    $scope.memId = $window.memId;
    $scope.getMember = function(id) {

        $timeout(function() {
            console.log(document.querySelector('#audio-' + id))
        });
    };

}]);