javascript - 双向绑定(bind)指令+ Controller

Question

我在 DOM 中动态添加一个文本字段(来自指令链接函数)并希望获取输入的值并将其推送到 Controller 范围对象，但它总是给我未定义，下面是我的代码:

<div class="input-group">
    <span class="fieldIcon input-group-addon"><i class="fa fa-sticky-note" aria-hidden="true"></i></span>
    <select name="addlist[]" multiple="multiple">
        <option ng-repeat="options in optionList">{{options.label}}</option>
    </select>
</div>
<script type="text/javascript">
    angular.module('myapp')
    .controller('AddContactController',[ '$scope', function ($scope) {
        $scope.optionList = [{label: 'NewList'}];        

        $scope.addOption = function(optionList) {
            console.log('List:', optionList); // its giving undefined
            scope.optionList.push(optionList);
        }

    }])
    .directive('optionList', ['$compile', function ($compile) {
        return {
            restrict: 'E',
            templateUrl: '/templates/int_optionList.html',
            controller: 'AddContactController',
            link: function(scope, element, attrs) {
                // Adding input field and on click of a button controllers addOption function should be called with the text field value
                var addListField = '<input class="form-control" type="text" ng-modal="addList" name="addList" placeholder="Add new list...">'+
                +'<button class="btn btn-default" type="button" ng-click="addOption()">';

                addListField = $compile(addListField)(scope);
                $(element).find('.multiselect-container').prepend(addListField);
            }
        }
    }]);
</script>

现在在 addOption 函数中，我得到的 optionList 值未定义。

Answer 1

错误是人为的:)。在指令中将 ng-modal 替换为 ng-model