1.編寫售賣界面
1.1代碼編寫
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>computed計(jì)算屬性練習(xí)</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<style type="text/css">
.container {
display: flex;
flex-direction: column;
width: 90%;
margin: 0 auto;
}
.item {
display: flex;
border: 1px solid #eee;
border-radius: 10px;
width: 95%;
height: 150px;
margin-bottom: 8px;
/* 垂直方向居中 */
align-items: center;
/* 水平方向居中 */
/* justify-content: center; */
padding-left: 10px;
padding-right: 10px;
}
.item-id {
flex: 1 1 10%;
}
.item-name {
flex: 1 1 20%;
font-weight: bold;
font-size: 20px;
}
.item-img {
flex: 1 1 20%
}
.item-img img {
width: 40%;
height: 40%;
}
.item-price {
flex: 1 1 20%;
font-weight: bold;
font-size: 20px;
}
.item-count {
flex: 1 1 30%;
}
.goods-count {
width: 35px;
height: 20px;
text-align: center;
}
.item-count button{
width: 30px;
height: 30px;
font-weight: bold;
}
.setbt{
display: flex;
justify-content: space-between;
align-items: center;
}
.btn{
width: 100px;
height: 40px;
background-color: #FF5000;
border-radius: 10px;
border: none;
outline: none;
color: #FFF;
font-size: 16px;
}
</style>
</head>
<body>
<div id="app">
<div class="container">
<div class="item" v-for="goods in goodsList">
<div class="item-id">
{{goods.id}}
</div>
<div class="item-img">
<img :src="goods.cover">
</div>
<div class="item-name">
<a :href="goods.ul">{{goods.name}}</a>
</div>
<div class="item-price">
{{goods.price}}
</div>
<div class="item-count">
<button type="button" @click="goods.count-=1" :disabled="goods.count === 0">-</button>
<input type="text" class="goods-count" v-model="goods.count" />
<button type="button" @click="goods.count+=1">+</button>
</div>
</div>
<hr>
<div class="setbt">
<h3>總價(jià)：￥{{totalPrice}}</h3>
<button type="button" class="btn" @click="setbt()">結(jié)算</button>
</div>
<div class="result" v-if="show">
你購買了{(lán){setbt}}件商品，需要支付總價(jià)為：{{totalPrice}}元
</div>
</div>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
goodsList: [{
id: 1,
name: 'iPhone 8',
cover: 'img/001.jpg',
price: 6000,
count: 1,
"ul":"https://gouwu.sogou.com/compare?query=202144365&cateid=198;199;200&adsUrl=http%3A%2F%2Fitem.jd.com%2F6077638.html&isads=1&bids=&pid=sogou-wsse-492114f6915a69aa-0000&host=sogou.com",
},
{
id: 2,
name: 'iPhone 6',
cover: 'img/002.jpg',
price: 7000,
count: 1,
"ul":"https://gouwu.sogou.com/compare?query=159696816&cateid=198;199;200&adsUrl=http%3A%2F%2Fwww.zol.com%2Fdetail%2Fcell_phone%2Fapple%2F28098081.html&isads=1&bids=&pid=sogou-wsse-492114f6915a69aa-0000&host=sogou.com",
},
{
id: 3,
name: 'iPhone X',
cover: 'img/003.jpg',
price: 8000,
count: 1,
"ul":"https://gouwu.sogou.com/compare?query=202144330&cateid=198;199;200&adsUrl=http%3A%2F%2Fitem.jd.com%2F6072692.html&isads=1&bids=&pid=sogou-wsse-492114f6915a69aa-0000&host=sogou.com",
}
],
show: false
},
methods: {},
computed: {
totalPrice: function() {
var totalPrice = 0;
var len = this.goodsList.length;
for (var i = 0; i < len; i++) {
totalPrice += this.goodsList[i].price * this.goodsList[i].count;
}
return totalPrice;
},
setbt: function() {
this.show = true;
var totalCount = 0;
var len = this.goodsList.length;
for (var i = 0; i < len; i++) {
totalCount += this.goodsList[i].count;
}
return totalCount;
}
}
})
</script>
</body>
</html>
1.2結(jié)果效果圖
image.png
1.3使其在手機(jī)上掃碼運(yùn)行
1.3.1使用計(jì)算機(jī)cmd命令輸入ipconfig,出現(xiàn)以下界面，復(fù)制其中IPv4地址
image.png
1.3.2將代碼運(yùn)行到瀏覽器，并將復(fù)制的地址覆蓋下圖中的紅框部分，然后將最后覆蓋后的整體鏈接復(fù)制下來
![]()
image.png
image.png
1.3.3將復(fù)制好的整體鏈接放入HBuilder中的web瀏覽器中，敲回車，然后點(diǎn)擊紅色圈類的二維碼，用手機(jī)瀏覽器掃碼獲取
image.png
1.3.4最后手機(jī)成功圖片
image.png
2.練習(xí)-搜索頁面的實(shí)現(xiàn)
2.1代碼編寫
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Vue.js computed練習(xí)-搜索頁面的實(shí)現(xiàn)</title>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<style type="text/css">
.container {
width: 90%;
margin: 0 auto;
}
.input-box {
width: 50%;
height: 25px;
margin-bottom: 10px;
}
.item {
display: flex;
height: 100px;
border: 1px solid #eee;
border-radius: 8px;
margin-bottom: 8px;
}
.item-title {
flex: 1 1 80%;
}
.item-thumbnail {
flex: 1 1 20%
}
.item-thumbnail img {
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="app">
<div class="container">
<input type="text" v-model="searchString" placeholder="請輸入" class="input-box" />
<div class="item" v-for="article in filteredArticles">
<a :href="article.url" class="item-title">
{{article.title}}
</a>
<div class="item-thumbnail">
<a :href="article.url" class="item-title"><img :src="article.image"></a>
</div>
</div>
</div>
</div>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
searchString: "",
// 數(shù)據(jù)模型
articles: [{
"title": "堪稱神器的3款在線工具，你一定用得上！",
"url": "http://www.itdecent.cn/p/e83e7999346b",
"image": "https://upload-images.jianshu.io/upload_images/11438996-56b25f32c9307b4b?imageMogr2/auto-orient/strip%7CimageView2/2/w/640/format/webp",
},
{
"title": "經(jīng)典面試題：從 URL 輸入到頁面展現(xiàn)到底發(fā)生什么？",
"url": "http://www.itdecent.cn/p/45ba3e0d0c7e",
"image": "https://upload-images.jianshu.io/upload_images/3973862-d90954249a6f6ccd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1000/format/webp",
},
{
"title": "如何免翻墻使用谷歌搜索和Chrome應(yīng)用商店",
"url": "http://www.itdecent.cn/p/484f8e6c88f6",
"image": "https://upload-images.jianshu.io/upload_images/858154-015a4b083685a3d1.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/800/format/webp",
},
{
"title": "四款前所未有好用的黑科技APP，絕對的良心實(shí)用，趕緊告訴家人",
"url": "http://www.itdecent.cn/p/2aec84d269fe",
"image": "https://upload-images.jianshu.io/upload_images/16042993-168b2cb17fd7ec0c?imageMogr2/auto-orient/strip%7CimageView2/2/w/640/format/webp",
},
{
"title": "堅(jiān)持學(xué)英語的方法有哪些",
"url": "http://www.itdecent.cn/p/0a6a61b0933c",
"image": "https://upload-images.jianshu.io/upload_images/3525704-c7293758fc59e56b.jpg?imageMogr2/auto-orient/strip%7CimageView2/2/w/960/format/webp",
}
]
},
computed: {
// 計(jì)算函數(shù)，匹配搜索
filteredArticles: function() {
var articles_array = this.articles,
searchString = this.searchString;
//搜索關(guān)鍵詞為空,則返回原始數(shù)據(jù)集
if (!searchString) {
return articles_array;
}
//搜索關(guān)鍵詞去除無用空格,轉(zhuǎn)換為小寫
searchString = searchString.trim().toLowerCase();
//過濾數(shù)組中每個(gè)元素,如果
articles_array = articles_array.filter(function(item) {
if (item.title.toLowerCase().indexOf(searchString) !== -1) {
return item;
}
})
// 返回轉(zhuǎn)化后的數(shù)組
return articles_array;;
}
}
})
</script
</body>
</html>
2.2頁面效果
image.png
