# 全选-复选框-控制表格的列的显示和隐藏
# 快速导航
# 背景
在做一些后台数据统计功能时,需要做一些展示层面上的过滤,结合复选框,显示和隐藏某一列或某一行
# 实例效果如下所示
# 实例代码如下所示
点击即可查看示例代码
<template>
<div>
<div class="el-checkbox-wrap">
<div class="select-all">
<el-checkbox
:indeterminate="isIndeterminate"
v-model="formParams.checkAll"
@change="handleCheckAllChange"
>全选
</el-checkbox>
</div>
<div>
<el-checkbox-group
v-model="formParams.checkeddotNames"
@change="handleCheckeddotNamesChange"
>
<el-checkbox
v-for="item in checkOptionsData"
:label="item.code"
:key="item.code"
>
{{ item.name }}
</el-checkbox>
</el-checkbox-group>
</div>
</div>
<!-- 表格部分开始 -->
<div class="table-content">
<el-table
:data="tableData"
resizable
height="100%"
ref="table"
border
style="width: 100%"
>
<el-table-column
fixed
align="center"
label="日期"
v-if="formParams.checkeddotNames.length"
:showOverflowTooltip="true"
>
<template slot-scope="scope">
<p>
{{ scope.row.date }}
</p>
</template>
</el-table-column>
<template v-for="(item, index) in dot_info">
<el-table-column
v-if="formParams.checkeddotNames.includes(item.code)"
align="center"
:label="item.name"
:key="index + Math.random()"
:showOverflowTooltip="true"
>
<el-table-column
align="center"
label="pv"
width="auto"
:showOverflowTooltip="true"
>
<template slot-scope="scope">
<p>
{{ scope.row[item.code] && scope.row[item.code].pv }}
</p>
</template>
</el-table-column>
<el-table-column
align="center"
label="uv"
width="auto"
:showOverflowTooltip="true"
>
<template slot-scope="scope">
<p>
{{ scope.row[item.code] && scope.row[item.code].uv }}
</p>
</template>
</el-table-column>
<el-table-column align="center" label="refer" width="auto">
<template slot-scope="scope">
<p>
<el-button
size="mini"
type="primary"
@click="handleLook(scope.row[item.code].refers, scope.$index)"
>查看
</el-button>
</p>
</template>
</el-table-column>
</el-table-column>
</template>
</el-table>
</div>
<!-- 表格部分结束 -->
<!-- 点击查看-出现弹窗开始 -->
<el-dialog title="查看refer" :visible.sync="dialogTableVisible">
<el-table :data="refers" border>
<el-table-column
align="center"
prop="pic_name"
label="refer"
:showOverflowTooltip="true"
></el-table-column>
<el-table-column
align="center"
prop="pv"
label="pv"
:showOverflowTooltip="true"
></el-table-column>
<el-table-column
align="center"
prop="uv"
label="uv"
:showOverflowTooltip="true"
></el-table-column>
</el-table>
<!-- <div slot="footer" class="dialog-footer">
<a class="el-button el-button--primary el-button--small"
@click="handleExportCurrentDate" :href="`/vedio/hbyl/statisticsExport?pic_name${pic_name}&pv=${pv}&uv=${uv}`">导出当前实时数据
</a>
</div> -->
</el-dialog>
<!-- 点击查看-出现弹窗结束-->
</div>
</template>
<script>
export default {
name: 'checkboxTable',
data() {
return {
formParams: {
checkAll: true, // 默认全选，true表示全选,false,不全选
checkeddotNames: [], // 绑定默认选中
code: "", // 向后端传的code字符串
},
dot_info: [
{
code: 'click',
name: "画报点击"
},
{
code: 'show',
name: "画报展现"
},
{
code: 'opt_bizhi',
name: "设置壁纸"
},
{
code: 'h5',
name: "设置H5"
},
{
code: 'video',
name: "视频播放"
}
], // 打点名称,模拟的数据源,后端返回的值
isIndeterminate: false, // 设置 indeterminate 状态，只负责样式控制
tableData: [
{
date: "2021-04-05",
dot_info: ["click","show","opt_bizhi","h5","video"],
name: "画报点击",
click: {
uv: "1111",
pv: "2222",
refers: [
{
pic_name: "click-xxxx1.jpg",
pv: 2000,
uv: 1000
}
]
},
show: {
uv: "3333",
pv: "4444",
refers: [
{
pic_name: "show-xxxx2.jpg",
pv: 2000,
uv: 1000
}
]
},
opt_bizhi: {
uv: 111,
pv: 222,
refers: [
{
pv: 222,
uv: 333,
pic_name:"设置壁纸-xxx.jpg"
}
]
},
h5: {
uv:2222,
pv: 333445,
refers: [
{
pv: 44554,
uv: 3442,
pic_name: "h5-xxx.jpg"
}
]
},
video: {
uv: 6666,
pv: 88888,
refers: [
{
pv: 23442,
uv: 244345,
pic_name: "视频-xxxx.jpg"
}
]
}
},
{
date: "2021-04-06",
dot_info: ["click","show","opt_bizhi","h5","video"],
name: "画报展现",
click: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: "xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
show: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: "xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
opt_bizhi: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: "xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
h5: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: "xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
video: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: "xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
},
{
date: "2021-04-07",
dot_info: ["click","show","opt_bizhi","h5","video"],
name: "设置壁纸",
click: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
show: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
opt_bizhi: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
h5: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
video: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
},
{
date: "2021-04-08",
dot_info: ["click","show","opt_bizhi","h5","video"],
name: "设置H5",
click: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
show: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
opt_bizhi: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
h5: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
video: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
},
{
date: "2021-04-09",
dot_info: ["click","show","opt_bizhi","h5","video"],
name: "视频播放",
click: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
show: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
opt_bizhi: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
h5: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
video: {
pv: 1234,
uv: 2323,
refers: [
{
pic_name: new Date()+"xxxx2.jpg",
pv: "2222",
uv:"5555"
}
]
},
}
], // 打点表格数据
dialogTableVisible: false, // 查看-弹出弹窗
refers: [], // 点击查看refer时,出现弹框
pic_name: "", // refer名称,
pv: "", // 查看pv,
uv: "", // 查看uv
}
},
computed: {
checkOptionsData() {
return this.dot_info;
},
},
beforeUpdate() {
// 切换表头，让某些表头显示和隐藏。这个时候切换时，解决表头会出现抖动的现象
this.$nextTick(() => {
//在数据加载完，重新渲染表格
this.$refs.table.doLayout();
});
},
mounted() {
this.formParams.checkeddotNames = this.dot_info.map(item => item.code)
},
methods: {
// 全选
handleCheckAllChange() {
//console.log("全选", val); // val就是v-model绑定的值,即this.formParams.checkAll
if (this.formParams.checkAll) {
// 当全选被选中的时候,循环遍历源数据,把数据的每一项加入到默认选中的数组中区
this.formParams.checkeddotNames = this.dot_info.map((item) => item.code);
} else {
this.formParams.checkeddotNames = [];
this.formParams.code = "";
}
this.isIndeterminate = false;
},
// 全选后面的单选
handleCheckeddotNamesChange(value) {
// value就是v-model绑定的值,即this.formParams.checkeddotNames
console.log(value);
if (this.formParams.checkeddotNames.length == this.dot_info.length) {
this.formParams.checkAll = true;
} else {
this.formParams.checkAll = false;
}
this.formParams.code = this.formParams.checkeddotNames.join(","); // 需要拼接成字符欻,用逗号,具体以什么样的格式,可与后端协商
},
// 点击查看
handleLook(Row) {
var row = JSON.parse(JSON.stringify(Row));
console.log(row);
if (row.length) {
this.refers = row;
console.log(row[0]);
const {pic_name,pv,uv} = row[0];
this.pic_name = pic_name;
this.pv = pv;
this.uv = uv;
console.log(this.pic_name, this.pv, this.uv);
} else {
this.refers = [];
}
this.dialogTableVisible = true;
},
}
}
</script>
<style lang="scss" scoped>
.select-all {
margin-right: 20px;
}
.el-checkbox-wrap {
display: flex;
align-content: center;
margin: 20px 0 20px 0;
}
.table-content {
margin: 20px 0 20px 0;
height: 100%;
}
.el-table__body-wrapper {
height: auto !important;
}
</style>
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# 分析
这里主要的难点有:
- 全选/复选框的实现
- 结合全选和复选框，控制表格中的某一列显示和隐藏,怎么和表格中的列数据给关联起来
- elementUI表格中某一行,显示三列或多列
切换时解决表格的抖动
beforeUpdate() {
// 切换表头，让某些表头显示和隐藏。这个时候切换时，解决表头会出现抖动的现象
this.$nextTick(() => {
//在数据加载完，重新渲染表格
this.$refs.table.doLayout();
});
},
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还有可能就是表格的索引问题key值最好不要用索引,可以给每一行添加一个唯一的key,设置Key,自己添加一个动态的key字符串
getNonDuplicateId(32);
function getNonDuplicateId(randomLength:number) {
let idStr = Date.now().toString(36);
idStr += Math.random().toString(36).substr(3,randomLength);
return idStr;
}
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