uniapp新增一条数据增加一个折叠栏

//折叠栏
<uni-collapse class='collapse' ref='collapse'><uni-collapse-item v-for="(item, index) in dataForm.beefCattleNums" :key="index" :title="item.fatCalfNum" class='collapse-item' title-border='show' :border='false' @click=toggleItem(dataForm,index)><view class="item"><view class="item-content"><view class="item"><text class="label">年份</text><text class="text ellipsis num">{{item.fatCalfNum}}</text></view></view><view class="item-content"><view class="item"><view class="label">货币资金(万元)</view><text class="text ellipsis num">{{item.fatCalfNum1}}</text></view></view></uni-collapse-item></uni-collapse>//新增按钮
<view class="table-footer-box"><image class="btn" src="/static/images/production/icon-add-bl.png" mode="" @click="addInventory"></image></view>//弹窗
<uni-popup ref="inventoryPopup" class="popup-cus"><add-bb-subject @addInventoryHandle="addInventoryHandle" @closeInventoryHandle="closeInventoryHandle"></add-bb-subject></uni-popup>

addInventory(){this.$refs.inventoryPopup.open()},addInventoryHandle(data){this.$refs.inventoryPopup.close()this.dataForm.beefCattleNums.push(Object.assign({}, data))  },closeInventoryHandle(){this.$refs.inventoryPopup.close()},

子组件：

<view class="form-item"><view class="form-item-label">年份</view><view class="form-item-content"><input v-model="dataForm.fatCalfNum" type="number" class="uni-input uni-input-box" placeholder-class="input-placeholder" confirm-type="done" placeholder="请输入年份" /></view></view><view class="form-item"><view class="form-item-label">货币资金(万元)</view><view class="form-item-content"><input v-model="dataForm.fatCalfNum1" type="number" class="uni-input uni-input-box" placeholder-class="input-placeholder" confirm-type="done" placeholder="请输入货币资金" /></view></view>
<view class="footer-box"><view class="btn-l-box" @click="cancelHandle">取消</view><view class="btn-r-box" @click="submitHandle">确定</view></view>async submitHandle() {this.$emit('addInventoryHandle',this.dataForm)},cancelHandle(){this.$emit('closeInventoryHandle')}