<div style="margin-left:20px;">

    <el-checkbox

        v-for="item in SigningcheckList"

        :key="item.index"

        :label="item.ele"

         v-model="item.status"

         @change="SigningChangeitem(item)"

    ></el-checkbox>

</div>

// 当checkbox的值发生改变的时候

    SigningChangeitem(val) {

      // 判断当前传过来元素的值是否是选中状态

      if (val.status == true) {

        this.SigningContent.push(val.ele);

      } else {

        //或者循环遍历数组删除选中元素

        for (let i = 0; i < this.SigningContent.length; i++) {

          const element = this.SigningContent[i];

          if (element == val.ele) {

            this.SigningContent.splice(i, 1);

          }

        }

      }