今年开始学习vue+element实现后台开发，在实现批量删除功能时有2个小知识点记录在下：

1、如何实现单击行交替选中当前行的复选框，element官网的table实例中没有找到。——通过row-click和toggleRowSelection实现

2、如何获取选中行的值来实现批量删除。——通过selection-change实现

代码如下

html:

<div class="row mt30 pl15">
            <el-button type="warning" @click="delGroup" :disabled="this.sels.length === 0">批量删除</el-button><!--disabled值动态显示，默认为true,当选中复选框后值为false-->
        </div>
        <el-table :data="tableList" :fit="true" @row-click="handleCurrentChange" @selection-change="selsChange" ref="table">
            <el-table-column type="selection" width="55" reserve-selection=""></el-table-column>
            <el-table-column prop="id" label="ID" width="150" class-name="bg_blue"></el-table-column>
            <el-table-column prop="cpsProductId" label="商品ID" width="200"></el-table-column>
            <el-table-column prop="productName" label="商品名称" width="200" show-overflow-tooltip></el-table-column>
            <el-table-column label="图片" width="200">
                <template scope="data1">
                    <img :src="data1.row.imgsrc" class="mt10 mb10">
                </template>
            </el-table-column>
            <el-table-column label="操作" align="center">
                <template scope="scope">
                    <el-button type="primary" size="small" @click="onEditSku(scope.row.id)">编辑</el-button>
                    <el-button size="small" @click="onDelProduct(scope.row.id)">删除</el-button>
                </template>
            </el-table-column>
        </el-table>

<script>
export default {
    name: 'product',
    mounted() {
        this.onSearch()
    },
    data() {
        return {
            sels: [],//选中的值显示 
            tableList: [],
            total: 0,
            start: 0,
            size: 10
        }
    },
    methods: {
        selsChange(sels) {
            this.sels = sels
        },
        delGroup() {
            var ids = this.sels.map(item => item.id).join()//获取所有选中行的id组成的字符串，以逗号分隔
        },
        handleCurrentChange(row, event, column) {
            this.$refs.table.toggleRowSelection(row)
        }
    }
}
</script>