1.vue基础
概念：Vue是一种流行的前端JavaScript框架，用于构建交互式的用户界面。它是一种开源框架，由尤雨溪（Evan You）开发并维护。Vue的目标是通过简单的API和响应式数据绑定来帮助开发者构建现代化的单页面应用程序
vue官方文档：https://cn.vuejs.org
demo1：入门案例——导入依赖
导入开发版本的vue.js
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<body>
<div id="app">
{{message}}
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script>
var app=new Vue({
el:"#app",
data:{
message:"Hello Vue！"
}
})
</script>
</body>
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也可导入vue.js
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| <!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>Vue基础</title>
<script src="vue.js"></script>
</head>
<body>
<div id="app">
{{ message }}
</div>
<script>
var app = new Vue({
el:'#app',
data:{
message:"Hello Vue!"
}
})
</script>
</body>
</html>
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demo2——el挂载点
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| <!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="vue.js"></script>
</head>
<body>
app元素外部：{{ message }}
<div id="app_1">
app元素内部:{{ message }}
<br>
<span>app元素内部的sapn标签下：{{ message }}</span>
</div>
<script>
var app = new Vue({
el:'#app_1',
data:{
message:"Hello Vue!"
}
})
</script>
<br>
<div class="app_2">
{{ message }}
</div>
<script>
var app = new Vue({
el:'.app_2',
data:{
message:"现在使用的class选择器"
}
})
</script>
<br>
<h2 id="app_3">
{{ message }}
</h2>
<script>
var app = new Vue({
el: '#app_3',
data:{
message:"这是H2元素"
}
})
</script>
</body>
</html>
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demo3：认识Vue实例——data数据对象
2.vue本地应用
通过vue实现常见的网页效果
| Vue指令 |
作用 |
| v-text |
设置标签的内容（textContent） |
| v-html |
设置元素的innerHTML |
| v-on |
为元素绑定事件 |
| v-show |
根据真假切换元素的显示状态 |
| v-if |
根据表达式的真假切换元素的显示状态 |
| v-bind |
为元素绑定属性 |
| v-for |
根据数据生成列表结构 |
| v-model |
便捷的设置和获取表单元素的值 |
v-text
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<h2 v-text="message"></h2>
<h2 v-text="info"></h2>
<h2>{{ message }}</h2>
<h2 v-text="message">深圳</h2>
<h2>{{ message }}深圳</h2>
<h2 v-text="message + '!!'"></h2>
<h2>{{ message + '!!'}}深圳</h2>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
message:"黑马程序员",
info:"前端与移动教研部"
}
})
</script>
</body>
</html>
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v-html
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<p v-html="content"></p>
<p v-text="content"></p>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
content: "<a href='http://www.itheima.com'>黑马程序员</a>"
}
})
</script>
</body>
</html>
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v-on
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<input type="button" value="事件绑定-点击" v-on:click="dolt">
<input type="button" value="事件绑定-双击" v-on:dblclick="dolt">
<input type="button" value="事件绑定-简写点击" @click="dolt">
<h2 @click="change">{{ food }}</h2>
</div>
<script>
var app = new Vue({
el:"#app",
data:{
food:"西蓝花炒鸡蛋"
},
methods:{
dolt:function(){
alert("做IT");
},
change:function(){
this.food += "好好吃！"
}
}
})
</script>
</body>
</html>
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<input type="button" value="点击" @click="doIt(666)">
<input type="text" @keyup.enter="sayHi">
</div>
<script>
var app = new Vue({
el:'#app',
methods:{
doIt:function(p1){
console.log("做It");
console.log(p1);
},
sayHi:function(){
alert("吃了没");
}
}
})
</script>
</body>
</html>
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v-show
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<input type="button" value="切换显示状态" @click="changeIsShow">
<img v-show="IsShow" src="1.png" alt="">
<br>
<span>{{ age }}</span>
<input type="button" value="年龄age增加" @click="changeAge">
<img v-show="age >= 18" src="1.png" alt="">
</div>
<script>
var app = new Vue({
el:'#app',
data:{
IsShow:false,
age:17
},
methods:{
changeIsShow:function(){
this.IsShow = ! this.IsShow;
},
changeAge:function(){
this.age++;
}
}
});
</script>
</body>
</html>
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v-if
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<button @click="ChangeShow">切换状态</button>
<p v-if="IsShow">我是一个p标签，由v-if控制</p>
<p v-show="IsShow">我是一个p标签，由v-show控制</p>
<p v-if="temperature >= 35">热死了！</p>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
IsShow:true,
temperature:40
},
methods:{
ChangeShow:function(){
this.IsShow = !this.IsShow;
}
}
});
</script>
</body>
</html>
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v-bind
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| <!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="vue.js"></script>
<style>
.active{
border: 1px solid red;
}
</style>
</head>
<body>
<div id="app">
全写：v-bind:src
<img v-bind:src="imgSrc" v-bind:title="imgTitle" alt="">
<br>
简写 ：src
<img :src="imgSrc" :title="imgTitle + '!!!!'" alt="">
<br>
添加类_三元表达式
<button @click="toggleActive">点击我改变class属性</button>
<img :src="imgSrc" :title="imgTitle + '!!!!'" :class="isActive?'active':''" alt="">
<br>
添加类_对象方式
<button @click="toggleActive">点击我改变class属性</button>
<img :src="imgSrc" :title="imgTitle + '!!!!'" :class="{active:isActive}" alt="">
</div>
<script>
var app = new Vue({
el:'#app',
data:{
imgSrc:"http://www.itheima.com/images/logo.png",
imgTitle:"黑马程序员",
isActive:false
},
methods:{
toggleActive:function(){
this.isActive = !this.isActive;
}
}
});
</script>
</body>
</html>
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v-for
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<li v-for="item in Array">你好,{{ item }}</li>
</ul>
<h2 v-for="item in vegetables" :title="item.name">{{ item.name }}</h2>
<button @click="add">点我添加</button>
<button @click="remove">点我移除</button>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
Array:["张三","李四","王五","马六","二蛋"],
vegetables:[
{name:"葱花炒蛋"},
{name:"番茄炒蛋"}
]
},
methods:{
add:function(){
this.vegetables.push({ name:"韭菜炒蛋"});
},
remove:function(){
this.vegetables.shift();
}
}
})
</script>
</body>
</html>
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v-model
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<input type="text" v-model="message" @keyup.enter="getMessage">
<h2>{{ message }}</h2>
<input type="button" value="点我修改" @click="setMessage">
</div>
<script>
var app = new Vue({
el:'#app',
data:{
message:"黑马程序员"
},
methods:{
getMessage:function(){
alert(this.message);
},
setMessage:function(){
this.message = "111";
}
}
});
</script>
</body>
</html>
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界面1：计数器
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| <!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="vue.js"></script>
</head>
<body>
<div class="input-num" id="app">
<button @click='reduce'>-</button>
<span>{{ num }}</span>
<button @click='add'>+</button>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
num:1
},
methods:{
reduce:function(){
console.log("reduce")
if(this.num == 1){
alert("不能为0")
}
else{
this.num--;
}
},
add:function(){
console.log("add")
if(this.num>=9){
alert("不能超过10个")
}
else{
this.num++;
}
}
}
});
</script>
</body>
</html>
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界面2：图片切换
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| <!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="vue.js"></script>
</head>
<body>
<div id="app">
<img :src="imgArray[index]" alt="">
<a href="#" @click="prev" v-show="index>0">上一张</a>
<a href="#" @click="next" v-show="index<imgArray.length-1">下一张</a>
</div>
<script>
var app = new Vue({
el:'#app',
data:{
imgArray:["https://img20.360buyimg.com/pop/s590x470_jfs/t1/222408/26/6055/99082/61b997c0Ead36013d/9b2da06b3f438624.jpg.webp",
"https://img14.360buyimg.com/pop/s590x470_jfs/t1/208171/7/13900/69634/61c96765E6e65374c/642ed952f9778144.jpg.webp",
"https://imgcps.jd.com/ling4/100012043978/5Lqs6YCJ5aW96LSn/5L2g5YC85b6X5oul5pyJ/p-5f3a47329785549f6bc7a6f4/a10ab487/cr/s/q.jpg",
"https://img12.360buyimg.com/pop/s590x470_jfs/t1/205354/16/17988/82004/61b1dc96Ee600f3f3/9ffa616349105df0.png.webp"
],
index:0,
},
methods:{
prev:function(){
this.index--;
},
next:function(){
this.index++;
}
}
});
</script>
</body>
</html>
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界面3：小黑记事本
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<!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="vue.js"></script>
</head>
<body>
<section id="todoapp">
<header class="header">
<h1>小黑笔记本</h1>
<input v-model="inputValue" @keyup.enter="add" type="text" autofocus="autofocus" autocomplete="off" placeholder="请输入任务" class="new_todo">
</header>
<section class="main">
<ul class="to_list">
<li class="todo" v-for="(item,index) in list">
<div class="view">
<span class="index">{{ index+1 }}</span>
<label>{{ item }}</label>
<button @click="remove(index)" class="destory">×</button>
</div>
</li>
</ul>
</section>
<footer class="footer">
<span class="todo_count" v-if="list.length!=0">
<strong>{{ list.length }}</strong>
items left
</span>
<button @click="clear" class="clear_completed" v-show="list.length!=0">Clear</button>
</footer>
</section>
<footer class="info">
</footer>
<script>
var app = new Vue({
el:'#todoapp',
data:{
list:["写代码","吃饭饭","睡觉觉"],
inputValue:"好好学习",
},
methods:{
add:function(){
this.list.push(this.inputValue);
},
remove:function(index){
console.log("1")
this.list.splice(index,1);
},
clear:function(){
this.list = [];
}
}
})
</script>
</body>
</html>
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3.vue网络应用
axios：功能强大的网络请求库，先导入再使用。使用get和post方法发送对应的请求，then方法中的回调函数会在请求成功或失败时触发，通过回调函数的形参可以获取相响应地址的内容或错误信息。
axios官网文档：http://www.axios-js.com/zh-cn/docs/
模板：
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| axios.get(地址?key=value&key2=values).then(function(response){},function(err){})
axios.post(地址,{key:value,key2:value2}).then(function(response){},function(err){})
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| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>25-网络应用- axios基本使用</title>
</head>
<body>
<input type="button" value="get请求" class="get">
<input type="button" value="post请求" class="post">
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script>
document.querySelector(".get").onclick=function(){
axios.get("https://autumnfish.cn/api/joke/list?num=3")
.then(function(response){
console.log(response);
},function(err){
console.log(err);
})
}
document.querySelector(".post").onclick=function(){
axios.post("https://autumnfish.cn/api/user/reg",{username:"阿香"})
.then(function(response){
console.log(response);
},function(err){
console.log(err);
})
}
</script>
</body>
</html>
|
axios与vue结合
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>26-网络应用- axios与vue结合使用</title>
</head>
<body>
<div id="app">
<input type="button" value="获取笑话" @click="getJoke">
<p>{{joke}}</p>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script>
var app=new Vue({
el:"#app",
data:{
joke:"笑话显示区域",
},
methods:{
getJoke:function(){
console.log(this.joke);
var that=this;
axios.get("https://autumnfish.cn/api/joke")
.then(function(response){
console.log(response);
console.log(response.data);
console.log(this.joke);
that.joke=response.data;
},function(err){
console.log(err);
})
}
}
})
</script>
</body>
</html>
|
界面4：查天气
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<!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>天知道</title>
<link rel="stylesheet" href="快速入门Vue.js资料\04-源代码\demo-天知道\css\index.css">
<link rel="stylesheet" href="快速入门Vue.js资料\04-源代码\demo-天知道\css\reset.css" />
</head>
<body>
<div class="wrap" id="app">
<div class="search_form">
<div class="logo"><img src="快速入门Vue.js资料\04-源代码\demo-天知道\img\logo.png" alt="logo" /></div>
<div class="form_group">
<input type="text" v-model="city" @keyup.enter="searchWeather" class="input_txt" placeholder="请输入查询的天气"/>
<button class="input_sub" @click="searchWeather">
搜 索
</button>
</div>
<div class="hotkey">
<a href="javascript:;" @click="changeCity('北京')">北京</a>
<a href="javascript:;" @click="changeCity('上海')">上海</a>
<a href="javascript:;" @click="changeCity('广州')">广州</a>
<a href="javascript:;" @click="changeCity('深圳')">深圳</a>
</div>
</div>
<ul class="weather_list">
<li v-for="item in weatherList">
<div class="info_type">
<span class="iconfont">{{ item.type }}</span>
</div>
<div class="info_temp">
<b>{{ item.low }}</b>
~
<b>{{ item.high }}</b>
</div>
<div class="info_date">
<span>{{ item.date }}</span>
</div>
</li>
</ul>
</div>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<script>
var app = new Vue({
el:'#app',
data:{
city:"",
weatherList:[]
},
methods:{
searchWeather:function(){
var that = this;
axios.get("http://wthrcdn.etouch.cn/weather_mini?city="+this.city)
.then(
function(response){
console.log(response.data.data.forecast);
that.weatherList = response.data.data.forecast;
},
function(err){
console.log(err);
}
)
},
changeCity:function(city){
this.city = city;
this.searchWeather();
}
}
})
</script>
</body>
</html>
|
4.vue综合实际
界面5：音乐播放器
1.歌曲搜索
2.歌曲播放
3.歌曲封面
4.歌曲评论
5.播放动画
6.mv播放
歌曲搜索
按下回车(v-on .enter)
查询数据(axios 接口 v-model )
渲染数据(v-for 数组 that)
点击播放(v-on 自定义参数)
点击播放按钮：播放歌曲的本质就是设置歌曲的src，切换歌曲就是更换不同的src，歌曲的地址从network查看，歌曲地址是通过接口获取到的，获取歌曲地址后找到歌曲播放地址，将播放地址存到data的musicUrl字段中，再传给给audio标签；
注：点击时需要传入参数，从接口获得的歌曲的点击事件才会才会被绑定。
歌曲地址获取：
根据接口确定一个传递的参数（歌曲id），搜索出的歌曲时服务器返回的结果数组中每一项都有歌曲id，不同歌曲id不同，但查询逻辑是一样的；（总：接口调用，把所需的参数传过去）
歌曲地址设置(v-bind)
data中增加歌曲属性，歌曲id依赖与歌曲的搜索结果，v-bind绑定到播放条中。
歌曲封面
播放动画
监听音乐播放(v-on play)
核心：增删一个类
播放时碟片旋转，暂停时停时旋转，检测动画的播放状态，在对应的事件中增删类名，
监听音乐暂停(v-on pause)
操纵类名(v-bind 对象)
audio标签的play事件会在音频播放的时候触发
audio标签的pause事件会在音频暂停的时候触发
通过对象的方式设置类名，类名生效与否取决于后面值的真假
播放mv
- mv图标显示(v-if)
- mv地址获取
- 遮罩层
- mv地址设置
源码地址：
本篇文章用于作者本人学习回顾时使用。
