技术学习分享_一航技术 技术资讯 Vue开发历程—音乐播放器的继续

Vue开发历程—音乐播放器的继续

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前言

前面一篇文章​​Vue开发历程—音乐播放器​​,实现了播放音乐,以及基本的布局。但是进度条没有实现同步,本文即介绍进度条的实现。

一、效果图

Vue开发历程---音乐播放器的继续

二、心路历程

1、elementUI 滑块的使用

<div class="block" style="margin-top:5px">
<el-slider v-model="value" @change="updateSlideTime()" :format-tooltip="formatTooltip"></el-slider>
</div>

2、JS的编写

进度条的状态是实时的,也就是每一秒每一刻都要变化,如何实现这一功能? 首先需要写一个方法,每30ms更新一次状态,同时在组件挂载完成的时候调用这个方法,从而实现了每30ms,即更新进度条的数值。 通过refs可以获得audio这个标签,这个标签上有duration(时长),currentTime(当前时间)这两个属性,通过这两个属性,可以计算出来进度的占比。

updateSongsTime: function () {
const timer = setInterval(() => {
const music = document.getElementById("m_mp3")||null;
if (music != null) {
this.currentTime = music.currentTime;
this.duration = music.duration;
this.persent = (this.currentTime / this.duration) * 100;
}

}, 30);
mounted() {
this.songNum = this.songNames.length;
const music = this.$refs.player;
this.updateSongsTime();

}

同时也需要在MusicPlayer.vue组件里面如法炮制,获取父组件的值从而实时更新滑块的状态,因为滑块是写在MusicPlayer组件里面了,但是歌曲的播放在父组件Player.vue里,所以也是用到了组件的通信。

3、时间的转化

由于currentTime返回来的是总秒数,而音乐播放器一般都是分:秒这样的格式,所以通过一些简单的数学计算(除以60求分,对60取余求秒)来进行对时长的格式化处理。采用了三目运算符,还对不足10的时间进行了处理,即小于10的数值前面自动补0

formatTooltip()
{
return Math.trunc(this.$parent.currentTime/60)+":"+((Math.trunc(this.$parent.currentTime%60)<10)?("0"+Math.trunc(this.$parent.currentTime%60)):Math.trunc(this.$parent.currentTime%60));
}

#源代码

代码如下: Player.vue

<template>
<div class="player_div1">
<transition name="open" mode="out-in">
<component v-bind:is="view" @hello="changeSlideState" @play="changePlayState" @lastSongs="lastSongs"
@nextSongs="nextSongs" @changeSongsTime="changeSongsTime"></component>
</transition>
<audio class="m_mp3" id="m_mp3" :src="this.songNames[this.index].Url" autoplay loop ref="player" controls
style="display:none">

</audio>
</div>

</template>

<script>
import HidePlayer from '@/part/HidePlayer'
import MusicPlayer from '@/part/MusicPlayer'
export default {
name: 'Player',
data() {
return {
view: MusicPlayer,
isClose: false,
isShow: true,
isRun: 'come',
index: 0,
songNum: 2,
currentTime: 0,
duration: 0,
persent: 0,
songNames: [
{
id: 6,
name: '庐州月-许嵩',
Url: require('@/assets/庐州月.mp3'),
png: require('@/assets/庐州月.png'),
},
{
id: 7,
name: '燕归巢-许嵩',
Url: require('@/assets/燕归巢.mp3'),
png: require('@/assets/燕归巢.jpg'),
},
{
id: 1,
name: '张韶涵-篇章',
Url: require('@/assets/张韶涵-篇章.mp3'),
png: require('@/assets/篇章.png'),
},
{
id: 2,
name: '爱就一个字 抒情版',
Url: require('@/assets/爱就一个字 抒情版.mp3'),
png: require('@/assets/爱就一个字.png'),
},
{
id: 3,
name: '最伟大的作品-周杰伦',
Url: require('@/assets/最伟大的作品-周杰伦.mp3'),
png: require('@/assets/周杰伦.jpg'),
},
{
id: 4,
name: '等你下课 (with 杨瑞代)-周杰伦',
Url: require('@/assets/等你下课 (with 杨瑞代)-周杰伦.mp3'),
png: require('@/assets/等你下课.png'),
},
{
id: 5,
name: '告白气球-周杰伦',
Url: require('@/assets/告白气球-周杰伦.mp3'),
png: require('@/assets/告白气球.png'),
},
{
id: 6,
name: '还在流浪-周杰伦',
Url: require('@/assets/还在流浪-周杰伦.mp3'),
png: require('@/assets/还在流浪.png'),
},
]
}
},
components: {
HidePlayer,
MusicPlayer
},
methods: {
changeSlideState() {
this.isClose = !this.isClose;
if (this.isClose) {
this.view = HidePlayer;
} else {
this.view = MusicPlayer;
}
},
changePlayState() {
if (!this.isShow) {
this.isShow = true;
this.isRun = "come";
document.getElementById("m_mp3").pause();
} else {
this.isShow = false;
this.isRun = "go";
var my_mp3 = document.getElementById("m_mp3");
my_mp3.play();


}
},
nextSongs() {
if (this.isShow) {
this.isShow = false;
this.isRun = "go";
}
this.index = (this.index + 1) % this.songNum;
},
lastSongs() {
if (this.isShow) {
this.isShow = false;
this.isRun = "go";
}
if (this.index == 0) {
this.index = this.songNum - 1;
} else {
this.index = this.index - 1;
}

},
changeSongsTime(value) {
const music = document.getElementById("m_mp3");
music.currentTime = value / 100 * music.duration;

}
,
updateSongsTime: function () {
const timer = setInterval(() => {
const music = document.getElementById("m_mp3")||null;
if (music != null) {
this.currentTime = music.currentTime;
this.duration = music.duration;
this.persent = (this.currentTime / this.duration) * 100;
}

}, 30)
}
}, mounted() {
this.songNum = this.songNames.length;
const music = this.$refs.player;
this.updateSongsTime();

}

}
</script>

<style scoped>
.open-enter-active {
animation: slide-in linear 0.5s;
}

.open-leave-active {
animation: slide-in reverse linear 0.5s;
}

@keyframes slide-in {
from {
transform: translateX(-100%);
}

to {
transform: translateX(0%);
}
}


</style>

MusicPlayer.vue

<template>
<div class="music">
<!-- 占位 -->
<div class="m_hold">

</div>
<div class="m_img">
<img :src="this.$parent.songNames[this.$parent.index].png" width="90px" :class="this.$parent.isRun">
</div>
<!-- 歌曲信息 -->
<div class="m_text">
{{ this.$parent.songNames[this.$parent.index].name }}
<div class="block" style="margin-top:5px">
<el-slider v-model="value" @change="updateSlideTime()" :format-tooltip="formatTooltip"></el-slider>
</div>

</div>
<!-- 音乐时间信息 -->
<div class="m_time">
<span>{{nowtime}} / </span>
<span>{{allTime}}</span>
</div>
<!-- 按钮 -->
<div class="m_btn">
<a href="#" class="m_prev" @click="playLastSong()"></a>
<a href="#" class="m_play" @click="changeState()" v-show="this.$parent.isShow"></a>
<a href="#" class="m_pause" @click="changeState()" v-show="!this.$parent.isShow"></a>
<a href="#" class="m_next" @click="playNextSong()"></a>
</div>
<!-- 折叠功能 -->
<div class="m_close" @click="changeCloseState()">
<a href=""></a>
</div>

</div>
</template>

<script>
export default {
name: 'MusicPlayer',
data() {
return {
songName: '',
value:0.0,


}
},
methods: {
changeState() {

this.$emit("play")
},
changeCloseState() {
this.$emit("hello");
},
playNextSong() {
this.$emit("nextSongs");
this.songName = this.$parent.songNames[this.$parent.index].name
},
playLastSong() {
this.$emit("lastSongs");
this.songName = this.$parent.songNames[this.$parent.index].name
},
changeSlideTime()
{
const timer = setInterval(()=>{
this.value = this.$parent.persent;

},30)
},
updateSlideTime()
{
this.$emit("changeSongsTime",this.value);
},
formatTooltip()
{
return Math.trunc(this.$parent.currentTime/60)+":"+((Math.trunc(this.$parent.currentTime%60)<10)?("0"+Math.trunc(this.$parent.currentTime%60)):Math.trunc(this.$parent.currentTime%60));
}
},
watch:
{


},
computed:{
nowtime()
{
return ((Math.trunc(this.$parent.currentTime/60)<10)?("0"+Math.trunc(this.$parent.currentTime/60)):(Math.trunc(this.$parent.currentTime/60)))+":"+((Math.trunc(this.$parent.currentTime%60)<10)?("0"+Math.trunc(this.$parent.currentTime%60)):(Math.trunc(this.$parent.currentTime%60)));
},
allTime()
{
return ((Math.trunc(this.$parent.duration/60)<10)?("0"+Math.trunc(this.$parent.duration/60)):(Math.trunc(this.$parent.duration/60)))+":"+((Math.trunc(this.$parent.duration%60)<10)?("0"+Math.trunc(this.$parent.duration%60)):(Math.trunc(this.$parent.duration%60)));
}
}
,mounted() {
this.songName = this.$parent.songNames[this.$parent.index].name;
this.changeSlideTime();

}

}
</script>

<style scoped>
/* 关于播放器的样式 */
.music {
width: 100%;
height: 120px;
background: black;
/* 相对浏览器定位 */
position: fixed;
left: 0px;
bottom: 0px;
/* bottom: 100px; */
/* border-bottom: 50px; */
/* 透明度 */
opacity: 0.8;
/* 阴影值 */
box-shadow: 10px 15px 15px 1px black
}

.music .m_hold {
float: left;
width: 90px;
height: 90px;
}

/* 调整音乐盒图片 */
.music .m_img {
margin-top: 15px;
margin-left: 10px;
margin-right: 10px;
/* 左浮动 */
float: left;
width: 90px;
height: 90px;
border-radius: 50%;
overflow: hidden;

}

/* 修改文字 */
.music .m_text {
/* 左浮动 */
float: left;
color: white;
font-size: 20px;
/* 字体加粗 */
font-weight: bold;
margin-top: 25px;
margin-left: 20px;
margin-bottom: 10px;
width: 25%;

}

/* 使得所有a标签一起移动 */
.music .m_btn {
float: left;
position: absolute;
/* 绝对定位:防止歌曲名称过长,挤出div */
left: 48%;
}

/* 修改a标签 */
.music .m_btn a {
width: 32px;
height: 32px;
float: left;
margin-top: 50px;
margin-left: 20px;
background: url(@/assets/player_bg.png);

}

.music .m_btn .m_prev {
background-position: -69px 0px;
}

.music .m_btn .m_next {
background-position: -150px 0px;
}

.music .m_btn .m_play {
background-position: -107px -5px;
}

.music .m_btn .m_prev:hover {
background-position: -69px -32px;
}

.music .m_btn .m_next:hover {
background-position: -150px -32px;
}

.music .m_btn .m_play:hover {
background-position: -107px -47px;
}

.music .m_btn .m_pause {
background-position: -292px -94px;
}

.music .m_btn .m_pause:hover {
background-position: -334px -94px;
}

/* 还有一个悬停 没写 */
/* 设置最右边的关闭样式 */
.music .m_close {
float: right;
background: white;
cursor: pointer;
width: 23px;
height: 100px;
margin-top: 10px;
background: url(@/assets/player_bg.png);

}
.m_time
{
width: 100px;
height: 20px;
margin-top: 64px;
float:left;
margin-left: 10px;
font:bold
}

/* 设置最右边的关闭样式 */
.music_hide {
float: left;
background: white;
cursor: pointer;
width: 23px;
height: 100px;
margin-top: 2px;
}

.go {
animation: bounce-in 2s linear infinite;
}

.come {
animation: none;
}

@keyframes bounce-in {
from {
transform: rotate(0deg);
}

to {
transform: rotate(360deg);
}
}

.open-enter-active {
animation: slide-in linear 0.5s;
}

.open-leave-active {
animation: slide-in reverse linear 0.5s;
}

@keyframes slide-in {
from {
transform: translateX(-100%);
}

to {
transform: translateX(0%);
}
}
</style>

HidePlayer.vue

<template>
<div class="music_hide" @click="changeCloseState()"><a href="#" class="m_open"></a></div>
</template>

<script>
export default {
name:'HidePlayer',
methods:{
changeCloseState()
{
this.$emit("hello");
}
}
}
</script>

<style scoped>
.music_hide {
float: left;
background: url(@/assets/player_bg.png);
cursor: pointer;
width: 23px;
height: 100px;
margin-top: 10px;
bottom: 0px;
/* bottom: 100px; */
position: fixed;
background-position-x: -45px;
}
</style>

总结

真可谓是基础不牢,地动山摇,由于CSS,JS学的很浅,现在很多的布局搞不明白,布局效果只有一点点的尝试,导致自己的开发进度变得特别特别缓慢,再次提醒各位C友,一定一定要注重基础的深入学习。勉之哉!!

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作者: 一航技术

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