div class="modal-footer">
  <button
    ng-if="step==1"
    type="button"
    class="btn btn-danger btn-sm"
    ng-click="start()"
  >
    <i class="glyphicon glyphicon-trash"></i>
    <!-- 确定删除 -->
    {{'ok'|translate}}
  </button>

  <button
    ng-if="step==2"
    ng-disabled="isStop"
    type="button"
    class="btn btn-warning btn-sm"
    ng-click="stop()"
  >
    <i class="glyphicon glyphicon-remove"></i>
    <!-- 停止 -->
    {{'stop'|translate}}
  </button>

  <button
    ng-if="step==3||