分别是
@mousedown="mousedown"
和
@mouseup="mouseup"

  <div class="jianghua" @mousedown="mousedown" @mouseup="mouseup">
    <p class="desc" v-if="status==0"><span class="dot"></span> 点击对讲按钮开始对讲</p>
    <p class="desc" v-if="status==1"><span class="dot"></span> 我在讲话</p>
    <div class="imgs"><img draggable="false" class="icon_jianghua" v-if="status==0"
                           src="../../../../assets/three/icon_jianghua.png"
                           alt="">
      <img draggable="false" class="icon_jianghua_active" v-if="status==1"
           src="../../../../assets/three/icon_jianghua_active.png" alt=""></div>
  </div>