题:
"""
1、按照上方 知识点总结 模块，总结今天所学知识点；
2、有以下广告数据（实际数据命名可以略做调整）
ad_data = {
tv: [
{img: 'img/tv/001.png', title: 'tv1'},
{img: 'img/tv/002.png', title: 'tv2'},
{img: 'img/tv/003.png', title: 'tv3'},
{img: 'img/tv/004.png', title: 'tv4'},
],
phone: [
{img: 'img/phone/001.png', title: 'phone1'},
{img: 'img/phone/002.png', title: 'phone2'},
{img: 'img/phone/003.png', title: 'phone3'},
{img: 'img/phone/004.png', title: 'phone4'},
]
}
i) 有两个大标题，电视和手机，点击对应的标题，渲染对应的数据
ii) 一个字典作为一个显示单位，定义一个子组件进行渲染（涉及父子组件传参）
3、在第2题基础上，页面最下方有一个 h2 标签，用来渲染用户当前选择的广告（点击哪个广告就是选中哪个广告）
i）当没有点击任何广告，h2 标签显示：未选中任何广告
ii）当点击其中一个广告，如tv1，h2 标签显示：tv1被选中
答:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>作业</title>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
<style>
body, h2 {
margin: 0;
}
.wrap {
880px;
margin: 0 auto;
}
.wrap:after {
content: '';
display: block;
clear: both;
}
.box {
200px;
border-radius: 10px;
overflow: hidden;
background-color: #eee;
float: left;
margin: 10px;
}
.box img {
200px;
height: 240px;
}
.box h2 {
text-align: center;
font-weight: normal;
font-size: 20px;
}
</style>
</head>
<body>
<div id="app">
<h1 @click="page='tv'">TV</h1>
<h1 @click="page='phone'">Phone</h1>
<div class="wrap" >
<local-tag1 v-for="tv in tvs" :tv="tv" v-if="page==='tv'" @action="actionFn"></local-tag1>
<local-tag2 v-for="phone in phones" :phone="phone" v-if="page==='phone'" @action="actionFn"></local-tag2>
</div>
<h2 >{{ h1 }}</h2>
</div>
</body>
<script src="../vue.js"></script>
<script>
let tvs = [
{img: 'tv1.jpg', title: 'tv1'},
{img: 'tv1.jpg', title: 'tv2'},
{img: 'tv1.jpg', title: 'tv3'},
{img: 'tv1.jpg', title: 'tv4'},
];
let phones = [
{img: 'phone1.jpg', title: 'phone1'},
{img: 'phone1.jpg', title: 'phone2'},
{img: 'phone1.jpg', title: 'phone3'},
{img: 'phone1.jpg', title: 'phone4'},
];
let localTag1 = {
props: ['tv'],
template: `
<div class="box" @click="fn">
<img :src="tv.img" alt="">
<h2>{{ tv.title }}</h2>
</div>
`,
methods: {
fn() {
console.log(this.tv.title);
this.$emit('action', this.tv.title);
}
}
};
let localTag2 = {
props: ['phone'],
template: `
<div class="box" @click="fn">
<img :src="phone.img" alt="">
<h2>{{ phone.title }}</h2>
<!-- <h2 style="display: none">{{ name }}</h2>-->
</div>
`,
methods: {
fn() {
console.log(this.phone.title);
this.$emit('action', this.phone.title);
}
}
};
new Vue({
el: '#app',
data: {
tvs,
phones,
page: 'phone',
h1: '未选中任何内容!'
},
components: {
localTag1,
localTag2,
},
methods: {
actionFn(a) {
if (!a){
this.h1='未选中任何内容!'
}
else{
console.log(a);
this.h1 = a
}
}
}
})
</script>
</html>