## 编写一个登录页面，使用Tab栏实现“账号登录”和“二维码登录”这两种方式的切换，并通过transition组件结合animate.css实现切换时的动画效果
1.CSS样式
编写自己想要的大小，颜色等
```html
#content{
width: 400px;;
margin: 60px auto;
}
.title{
height: 50px;
border-bottom: 1px solid #e1e7ec;
text-align: center;
}
#content a{
text-decoration: none;
color: black;
font-size: 16px;
background: #f1f1f1;
padding: 5px 10px;
margin: 0 10px;
border-radius: 5px;
}
.form-input{
height: 46px;
line-height: 46px;
margin-top: 10px;;
}
input{
box-sizing: border-box;
padding: 0 25px;
background: #eef3f5;
border-radius: 8px;
width: 100%;
height: 100%;
border: 0;
outline: 0;
font-size: 14px;
}
#content .active{
background-color: #09f;
color: #fff;
}
.primary-button{
background: linear-gradient(325deg,#4aa4ff,#1058fa);
width: 100%;
height: 42px;
border-radius: 23px;
border: 0;
outline: none;
color: #fff;
letter-spacing: 10px;
font-weight: 500;
font-size: 16px;
cursor: pointer;
margin-top: 30px;
}
.pic{
width: 200px;
height: 200px;
margin: 0 auto;
}
.pic img{
width: 100%;
height: 100%;
}
```
2.页面结构
```html
<!-- 定义登录组件 -->
<template id="example1">
<div>
<!-- 唯一的根容器 -->
<div class="form-input">
<input type="text" name="user" placeholder="请输入手机号/邮箱" class="form-input">
</div>
<div class="form-input">
<input type="password" name="psd" placeholder="请输入密码" class="form-input">
</div>
<button type="button" class="primary-button"><span>登录</span></button>
</div>
</template>
<!-- 二维码登录 -->
<template id="example2">
<div class="pic">
<img src="./erweima.png">
</div>
</template>
<div id="content">
<div class="title">
<a href="javascript:;" @click="compontentName = 'example1',cur=0" :class="{active:cur == 0}">账号登录</a>
<a href="javascript:;" @click="compontentName = 'example2',cur=1" :class="{active:cur == 1}">二维码登录</a>
</div>
<transition enter-active-class="animated bounceInDown">
<component :is="compontentName"></component>
</transition>
</div>
```
3.Javascript
```html
Vue.component('example1',{template:'#example1'})
Vue.component('example2',{template:'#example2'})
var vm = new Vue({
el: '#content',
data: {
compontentName :'example1',
cur:0
}
});
```
全代码：
```html
<!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>登录</title>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<link href="https://cdn.jsdelivr.net/npm/animate.css@3.5.1" rel="stylesheet" type="text/css">
<style>
#content{
width: 400px;;
margin: 60px auto;
}
.title{
height: 50px;
border-bottom: 1px solid #e1e7ec;
text-align: center;
}
#content a{
text-decoration: none;
color: black;
font-size: 16px;
background: #f1f1f1;
padding: 5px 10px;
margin: 0 10px;
border-radius: 5px;
}
.form-input{
height: 46px;
line-height: 46px;
margin-top: 10px;;
}
input{
box-sizing: border-box;
padding: 0 25px;
background: #eef3f5;
border-radius: 8px;
width: 100%;
height: 100%;
border: 0;
outline: 0;
font-size: 14px;
}
#content .active{
background-color: #09f;
color: #fff;
}
.primary-button{
background: linear-gradient(325deg,#4aa4ff,#1058fa);
width: 100%;
height: 42px;
border-radius: 23px;
border: 0;
outline: none;
color: #fff;
letter-spacing: 10px;
font-weight: 500;
font-size: 16px;
cursor: pointer;
margin-top: 30px;
}
.pic{
width: 200px;
height: 200px;
margin: 0 auto;
}
.pic img{
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<!-- 定义登录组件 -->
<template id="example1">
<div>
<!-- 唯一的根容器 -->
<div class="form-input">
<input type="text" name="user" placeholder="请输入手机号/邮箱" class="form-input">
</div>
<div class="form-input">
<input type="password" name="psd" placeholder="请输入密码" class="form-input">
</div>
<button type="button" class="primary-button"><span>登录</span></button>
</div>
</template>
<!-- 二维码登录 -->
<template id="example2">
<div class="pic">
<img src="./erweima.png">
</div>
</template>
<div id="content">
<div class="title">
<a href="javascript:;" @click="compontentName = 'example1',cur=0" :class="{active:cur == 0}">账号登录</a>
<a href="javascript:;" @click="compontentName = 'example2',cur=1" :class="{active:cur == 1}">二维码登录</a>
</div>
<transition enter-active-class="animated bounceInDown">
<component :is="compontentName"></component>
</transition>
</div>
<script>
Vue.component('example1',{template:'#example1'})
Vue.component('example2',{template:'#example2'})
var vm = new Vue({
el: '#content',
data: {
compontentName :'example1',
cur:0
}
});
</script>
</body>
</html>
```
