成功提交表单后，输入类型文件不会清除

Question

当我提交表单时，输入文本正在清除，但上传的文件没有清除。我使用了$ scope.addAnswerForm。$ setPristine（）;但这不起作用。

    app.directive('fileModel', ['$parse',
      function($parse) {
        return {
          restrict: 'A',
          link: function(scope, element, attrs) {
            var model = $parse(attrs.fileModel);
            var modelSetter = model.assign;

            element.bind('change', function() {
              scope.$apply(function() {
                modelSetter(scope, element[0].files[0]);
              });
            });
          }
        };
      }
    ]);
    app.controller("MyCtrl", function($scope, $http) {
      $scope._answer = {
        text: '',
        comment_pic: ''
      };

      $scope.__answer = JSON.parse(JSON.stringify($scope._answer));

      $scope.addAnswer = function(todo) {
        var data = {
          answer: $scope.__answer.text,
          comment_pic: $scope.__answer.comment_pic,
        };


        var fd = new FormData();
        for (var key in data) {
          fd.append(key, data[key])
        };

        $http({
          url: '/posturl'
          data: fd,
          method: "POST",
          headers: {
            'Content-Type': undefined
          }
        }).success(function(data, status) {
          todo.answers.push($scope.__answer);
          $scope._answer.comment_pic = "";
          $scope.__answer = JSON.parse(JSON.stringify($scope._answer));
        });
      };
    });

<div ng-controller="myCtrl">
  <form name="addAnswerForm">
    <input ng-model="__answer.text" />
    <input type="file" file-model="__answer.comment_pic" />
    <button type="submit" ng-click="addAnswer(discussion)">Post</button>
  </form>
</div>

提交表单后如何使表单清晰 这个输入类型=“文件”中的文件没有被清除

Answer 1

通过清除表单的DOM，表单将被清除。

的document.getElementById（＆＃34; MyformId＆＃34）。复位（）;

如果有另一种方法告诉