element-ui的表格有多选框时翻页记住之前选择的数据（复选框 选择框 保留之前的选中id）

<el-table :row-key="getRowKeys"  ref="multipleTable" :data="tableData" tooltip-effect="dark" style="width: 100%" @selection-change="handleSelectionChange">
            <el-table-column :reserve-selection="true" align="center" type="selection"></el-table-column>
            <el-table-column align="center" label="商品图片">
                <template slot-scope="scope">
                    <div>
                        <img style="width: 60px; height: 60px" :src="scope.row.pic_cover" alt />
                    </div>
                </template>
            </el-table-column>
            <el-table-column align="center" prop="goods_name" label="商品名称"></el-table-column>
            <el-table-column align="center" prop="price" label="商品价格"></el-table-column>
        </el-table>

getRowKeys(row) {
            return row.goods_id;
        },