VUE的tab页面切换的四种方法
目录
1.静态实现方法:
2.第二种模拟动态方法
3.第三种动态数据方法
4.动态实现方法(模拟后台数据实现)
项目遇到的bug:
1.静态实现方法:效果图:
<!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>view的tab交互</title>
<link rel="stylesheet" href="../css/demo.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
<div class="demo_warp" id="my">
<ul class="tab_tit">
<li :class="n==1?'active':''" @click="n=1">标题一</li>
<li :class="n==2?'active':''" @click="n=2">标题二</li>
<li :class="n==3?'active':''" @click="n=3">标题三</li>
<li :class="n==4?'active':''" @click="n=4">标题四</li>
</ul>
<!-- neirong -->
<div class="tab_con">
<div v-show="n==1">内容一</div>
<div v-show="n==2">内容二</div>
<div v-show="n==3">内容三</div>
<div v-show="n==4">内容四</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script> Vue.config.productionTip=false </script>
<script src="../js/tab.js" type="text/javascript"></script>
</body>
</html>
css
*{
margin: 0;
padding: 0;
box-sizing:border-box;
}
body,html{
height: 100%;
}
.demo_warp .tab_tit {
display: flex;
flex: 1;
margin:.2rem;
}
.demo_warp .active {
color:red;
background-color: cadetblue;
}
.demo_warp ul li {
list-style: none;
width: 23%;
text-align: center;
background-color: #ccc;
margin:0 1%;
}
.demo_warp .tab_con {
width: 100%;
height: 3rem;
border:1px solid rgb(85, 85, 177);
text-align: center;
}
js
window.onload=function(){
new Vue({
el:'#my',
data:{//响应式的数据 data变化页面也会跟着变化
n:1
}
})
}
2.第二种模拟动态方法效果如上图所示:（省略）
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>view的tab交互</title>
<link rel="stylesheet" href="../css/demo.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
<div class="demo_warp" id="my">
<ul class="tab_tit">
<li v-for="(v,i) in title" :class="n==i?'active':''" @click="n=i">{{v}}</li>
</ul>
<!-- neirong -->
<div class="tab_con">
<div v-for="(v,i) in con" v-show="n==i">{{v}}</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script> Vue.config.productionTip=false </script>
<script src="../js/tab.js" type="text/javascript"></script>
</body>
</html>
css
*{
margin: 0;
padding: 0;
box-sizing:border-box;
}
body,html{
height: 100%;
}
.demo_warp .tab_tit {
display: flex;
flex: 1;
margin:.2rem;
}
.demo_warp .active {
color:red;
background-color: cadetblue;
}
.demo_warp ul li {
list-style: none;
width: 23%;
text-align: center;
background-color: #ccc;
margin:0 1%;
}
.demo_warp .tab_con {
width: 100%;
height: 3rem;
border:1px solid rgb(85, 85, 177);
text-align: center;
}
js
window.onload=function(){
new Vue({
el:'#my',
data:{//响应式的数据 data变化页面也会跟着变化
n:0,
title:["标题一","标题二","标题三","标题四"],
con:["内容一","内容二","内容三","内容四"]
}
})
}
3.第三种动态数据方法效果图:(滚动条的实现方式)
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>view的tab交互</title>
<link rel="stylesheet" href="../css/demo.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
<div class="demo_warp" id="my">
<ul class="tab_tit">
<li v-for="(v,i) in lists" :class="n==i?'active':''" @click="n=i">{{v.title}}</li>
</ul>
<!-- neirong -->
<div class="tab_con">
<div v-for="(v,i) in lists" v-show="n==i">{{v.con}}</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script> Vue.config.productionTip=false </script>
<script src="../js/tab.js" type="text/javascript"></script>
</body>
</html>
css
*{
margin: 0;
padding: 0;
box-sizing:border-box;
}
body,html{
height: 100%;
}
.demo_warp .tab_tit{
display: flex;
justify-content: space-between;
white-space: nowrap;
overflow-y: hidden;
overflow-x: scroll;
margin:1% 1% 1% 0;
}
::-webkit-scrollbar{
display: none;
}
.demo_warp .active {
color:red;
background-color: cadetblue;
}
.demo_warp ul li {
list-style: none;
padding:1.2% 3.2%;
text-align: center;
background-color: #ccc;
margin-left: 1%;
}
.demo_warp .tab_con {
width: 100%;
height: 3rem;
border:1px solid rgb(85, 85, 177);
text-align: center;
}
js
window.onload=function(){
new Vue({
el:'#my',
data:{//响应式的数据 data变化页面也会跟着变化
n:0,
lists:[//可以有很多条数据//数组对象的形式
{title:'标题一',con:'内容一'},
{title:'标题二',con:'内容二'},
{title:'标题三',con:'内容三'},
{title:'标题四',con:'内容四'},
{title:'标题五',con:'内容五'},
{title:'标题六',con:'内容六'},
{title:'标题七',con:'内容七'},
{title:'标题八',con:'内容八'},
]
}
})
}
4.动态实现方法(模拟后台数据实现)效果图:
代码:
<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>view的tab交互</title>
<link rel="stylesheet" type="text/css" href="../css/demo.css" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >
</head>
<body>
<div class="demo_warp" id="my">
<ul class="tab_tit">
<li v-for="(v,i) in lists" :class="m==i?'active':''" @click="m=i" :key="i.title">{{v.title}}</li>
</ul>
<!-- neirong -->
<div class="tab_con">
<div v-for="(v,i) in lists" v-show="m==i" :key="i.con">{{v.con}}</div>
</div>
<!-- -----------动态数据----------- -->
<ul class="tab_tit">
<li v-for="(item, index) in itemList" :class="n==index?'active':''" @click="n=index" :key="index">{{item.name}}</li>
</ul>
<!-- neirong -->
<div class="tab_con">
<div v-for="(item, index) in itemList" v-show="n==index" :key="index">{{item.state}}</div>
</div>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script> Vue.config.productionTip=false </script>
<script src="../node_modules/axios/dist/axios.js"></script>
<script src="../js/tab.js" type="text/javascript"></script>
</body>
</html>
css
*{
margin: 0;
padding: 0;
box-sizing:border-box;
}
body,html{
height: 100%;
}
.demo_warp .tab_tit{
display: flex;
justify-content: space-between;
white-space: nowrap;
overflow-y: hidden;
overflow-x: scroll;
margin:1% 1% 1% 0;
}
::-webkit-scrollbar{
display: none;
}
.demo_warp .active {
color:red;
background-color: cadetblue;
}
.demo_warp ul li {
list-style: none;
padding:1.2% 3.2%;
text-align: center;
background-color: #ccc;
margin-left: 1%;
}
.demo_warp .tab_con {
width: 100%;
height: 3rem;
border:1px solid rgb(85, 85, 177);
text-align: center;
}
tab.js
window.onload=function(){
new Vue({
el:'#my',
data(){//响应式的数据 data变化页面也会跟着变化
return{
n:0,
m:0,
lists:[
{title:'标题一',con:'内容一'},
{title:'标题二',con:'内容二'},
{title:'标题三',con:'内容三'},
{title:'标题四',con:'内容四'},
{title:'标题五',con:'内容五'},
{title:'标题六',con:'内容六'},
{title:'标题七',con:'内容七'},
{title:'标题八',con:'内容八'},
],
itemList:[]
}
},
methods:{
getList:function(){//this:--【函数和定时器的this指向都是window (而我们是要this指向vue实例)】
var that=this;//局部定义改变this指向
//每执行此方法，提前清空数组，保证往下执行代码，数组为空
// this.itemList = [];
axios({
method:'get',
url:'http://localhost:4000/list'
}).then(function(res){
console.log(res);
that.itemList = res.data.result;
}).catch(function(error){
console.log(error);
})
}
},
mounted:function(){
this.getList();
},
})
}
nodeServer.js
/*
connect 是一个node中间件 (middeware)框架
如果把一个http处理过程比作是污水处理 中间件就像是一层层的过滤网
每个中间件把http处理过程中通过改写 request或(和)response的数据、状态、实现了特定的功能
中间件就是类似于一个过滤器的东西 在客户端和应用程序之间的一个处理请求和响应的方法.
*/
//创建中间介 启动服务 node node.js
var connect = require('connect');//创建连接
var bodyParser=require('body-parser');//body解析 用于处理 JSON、RAW、Text和URL编码的数据.
var lists = {};
var app = connect()
.use(bodyParser.json())//JSON解析
.use(bodyParser.urlencoded({extended:true}))
//use()方法还有一个可选的路径字符串 对传入请求的URL的开始匹配
//use()方法来维护一个中间件队列
.use(function(req,res,next){
//跨域处理
//website you wish to allow to connect
res.setHeader('Access-Control-Allow-origin','*');//允许任何源
//Request Methods you width to allow
res.setHeader('Access-Control-Allow-Methods','CET','POST','OPTIONS','PUT','PATCH','DELETE');//允许任何方法
//Request headers you wish to allow
res.setHeader('Access-Control-Allow-Headers','*');//允许任何类型
res.writeHead(200,{"Content-Type":"text/plain/xml;charset=utf-8"});//utf-8转码
next();//next方法就是一个递归调用
})
.use('/list',function(req,res,next){
var data={
"code":"200",
"msg":"success",
"result":[
{name:"手机",state:"采购一"},
{name:"包包",state:"采购二"},
{name:"衣服",state:"采购三"},
{name:"电脑",state:"采购四"},
{name:"电子产品",state:"采购五"}
]
}
res.end(JSON.stringify(data));
next();
})
.use('/list_get',function(req,res,next){
var data={
"code":'200',
"msg":"success",
"result":lists
}
res.end(JSON.stringify(data));
next();
})
.use('/list_add',function(req,res,next){
if(req.method=='POST'){
console.log(req.body.name);
lists.push({name:req.body.name,state:req.body.state,id:index++});
var data={"code":200,"msg":"success"};
res.end(JSON.stringify(data));
}else{
res.end(JSON.stringify({}));
}
next();
})
.use('/list_del',function(req,res,next){
console.log(req.body.id);
//lists=lists.filter(list=>list.id!=req.body.id);
for(var i=0;i<lists.length;i++){
if(req.body.id===lists[i].id){
lists.splice(i,1);
}
}
console.log(lists);
var data={"code":200,"msg":"success"};
res.end(JSON.stringify(data));
next();
})
.listen(4000);
console.log('Server started on port 4000.');
插件:（需要下载的插件）
1.先启动服务node nodeServer.js（不能关闭，否则就会调取不到数据）
2.之后运行html页面 。
vue中v-for循环遍历后，当前内容不渲染的问题,因为this指向的问题导致.
解决方法一:
解决方法二:
解决方法三:
总结:url：接口要写自己后台的接口哦，这里只是模拟的接口,nodeServer.js文件可以定义多种格式的数据类型，也可以在本地自定义嵌套多种需要的类型，先试用之后可以在调后台数据。
推荐学习VUE：文档 ::https://cn.vuejs.org/v2/guide/list.html
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