ngf-select不起作用

Question

我正在尝试从下拉菜单中选择菜单，但我的ngf-select无效。            显示2个图像进行比较

  <form ng-submit="submitImgs()">
    <div>
      <!-- <div>
        <div ng-repeat="img in files">
          <img ngf-thumbnail="image" style="width: 50%; height: 50%"/><br />
        </div>
      </div> -->
      <button class="btn btn-info" ngf-select ng-model="files" ngf-multiple="true" ngf-capture="capture" ngf-resize="{width: 500}">
        Select Files
      </button>
    </div>
    <button class="btn btn-default" type="submit">COMPARE</button>
  </form>
</div>

我认为我包含了ngf-select工作所需的所有cd

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.8/angular-route.js"></script>
<script src="https://cdn.jsdelivr.net/angular.file-upload/12.2.9/ng-file-upload-all.js"></script>
<script src="https://cdn.jsdelivr.net/angular.file-upload/12.2.9/ng-file-upload-shim.js"></script>
<script src="https://cdn.jsdelivr.net/angular.file-upload/12.2.9/ng-file-upload.js"></script>

如果有人知道这里发生了什么，请告诉我。

先谢谢！