vue中element-ui添加按钮

 <div v-for="(v,i) in list">
        <el-form  label-width="120px" size="small">
          <el-row :span="24">
            <el-col :span="11">
              <el-form-item label="中心机房id *">
                <el-input  v-model="list[i].idc_id" placeholder="请输入机房id"></el-input>
              </el-form-item>
            </el-col>
            <el-col :span="10">
              <el-form-item label="专线IP">
                <el-input  v-model="list[i].addr" placeholder="请输入专线IP">
                </el-input>
              </el-form-item>
            </el-col>
            <el-col :span="3">
              <el-button type="primary" icon="el-icon-plus" size="mini" circle @click="plus(i)"></el-button>
              <el-button type="warning" icon="el-icon-minus" size="mini" circle @click="minus(i)"></el-button>
            </el-col>
          </el-row>
        </el-form>
      </div>
 <div v-for="(v,i) in list">