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具体代码：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14/dist/vue.js"></script>
<style>
*{
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
.main{
width: 1200px;
margin: 0 auto;
margin-top: 50px;
}
.thead{
height: 40px;
line-height: 40px;
border: 1px solid #333;
}
.thead ul,.tbody ul {
display: flex;
justify-content: space-evenly;
}
.thead ul li {
text-align: center;
flex: 1;
border-right: 1px solid red;
}
.thead ul li:last-child{
border-right: 0;
}
.tbody ul{
border-bottom: 1px solid rgb(24, 24, 24);
}
.tbody ul li {
text-align: center;
flex: 1;
line-height: 40px;
}
.tbody li span {
user-select: none;
cursor: pointer;
display: inline-block;
vertical-align: middle;
width: 30px;
height: 30px;
line-height: 30px;
font-size: 18px;
font-weight: 400;
background-color: rgb(214, 214, 214);
}
.tbody li span:active{
background-color: rgb(192, 192, 192);
}
.tbody .count input{
user-select: none;
outline: none;
width: 30px;
height: 30px;
text-align: center;
cursor: not-allowed;
margin: 0 14px;
}
.select{
vertical-align: middle;
width: 20px;
height: 20px;
}
label{
margin-left: 10px;
}
.nonum{
cursor: not-allowed !important;
}
.nonum:active{
background-color: rgb(214, 214, 214) !important;
}
</style>
</head>
<body>
<div class="main" id="app">
<div class="thead">
<ul>
<!-- 不用v-model 使用:checked 和 change 来结合 -->
<li><input type="checkbox" class="select" :checked="allselect()" @change="callOff"><label>全选</label></li>
<li>商品ID</li>
<li>商品名称</li>
<li>商品价格</li>
<li>商品数量</li>
<li>商品小计</li>
<li>操作</li>
</ul>
</div>
<div class="tbody">
<ul v-for="(item,index) in arr" :key="item.id">
<!-- 不用v-model 使用:checked 和 change 来结合 -->
<li><input type="checkbox" class="select" :checked="item.isSelect" @change="item.isSelect = !item.isSelect"></li>
<li>{{item.id}}</li>
<li>{{item.proName}}</li>
<li>{{item.price}}</li>
<li class="count">
<span class="add" @click="add(item)">+</span>
<input type="text" v-model="item.num" readonly >
<!-- 如果当前的数量为1时（等于currentNum）添加类名nonum -->
<span class="minus" @click="minus(item)" :class="{'nonum':currentNum == item.num}">-</span>
</li>
<li>{{item.num * item.price}}</li>
<li><button @click="del(index)">删除</button></li>
</ul>
</div>
<div>总价：{{getSum1.sum}} 总数:{{getSum1.allNum}}</div>
<button @click="delSelect">删除选中</button>
<button @click="invert">反选</button>
</div>
<script>
new Vue({
el: "#app",
data:{
arr:[
{
id: 1,
proName: "小米",
num: 5,
price: 1999
},
{
id: 2,
proName: "华为",
num: 6,
price: 2999
},
{
id: 3,
proName: "联想",
num: 7,
price: 3999
},
{
id: 4,
proName: "苹果",
num: 7,
price: 3999
}
]
,
currentNum:1
},
methods:{
add(item){
item.num++;
},
minus(item){
if(item.num == 1){
item.num = 1;
}else{
item.num--;
}
},
del(index){
alert("删除"+this.arr[index].proName)
this.arr.splice(index,1)
},
allselect(){
return this.arr.every(val=>val.isSelect)
},
delSelect(){
this.arr = this.arr.filter(val=>!val.isSelect)
},
callOff(){
for(let i = 0; i < this.arr.length; i++){
this.arr[i].isSelect = !this.arr[i].isSelect
}
},
invert(){
for(let i = 0; i < this.arr.length; i++){
if(this.arr[i].isSelect){
this.arr[i].isSelect = !this.arr[i].isSelect
}else{
this.arr[i].isSelect = !this.arr[i].isSelect
}
}
}
},
computed:{
getSum1(){
let selAll = this.arr.filter(val=> val.isSelect);
let sum = 0;
for(let i = 0; i < selAll.length; i++){
sum += selAll[i].num * selAll[i].price
}
return {sum, allNum:selAll.length}
}
},
beforeCreate(){
},
create(){
},
beforeMount(){
},
mounted(){
this.arr.map(val=>{
this.$set(val,"isSelect",true)
})
},
beforeUpdate(){
},
updated(){
},
beforeDestroy(){
},
destroyed(){
},
activated(){
},
deactivated(){
}
})
</script>
</body>
</html>
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