微信小程序实战之网易云音乐歌曲详情页实现代码

<!--pages/songDetail/songDetail.wxml-->
<view class="songDetailContainer">
  <view class="author">{{song.ar[0].name}}</view>
  <view class="circle"></view>
  <image class="needle {{isPlay?'needleRotate':''}}" src="/static/images/song/needle.png"></image>
 
  <view class="discContainer {{isPlay?'discAnimation':''}}">
   <image class="disc" src="/static/images/song/disc.png"></image>
   <image class="musicImg" src="{{song.al.picUrl}}"></image>
  </view>
 
  <!-- 进度条控制区域 -->
  <view class="progressControl">
    <text>{{currentTime}}</text>
    <!-- 总进度条 -->
    <view class="barControl">
      <!-- 实时进度条 -->
      <view class="audio-currentTime-Bar" style="width: {{currentWidth + 'rpx'}}">
        <!-- 小圆球 -->
        <view class="audio-circle"></view>
      </view>
    </view>
    <text>{{durationTime}}</text>
  </view>
 
  <!-- 底部控制播放区域 -->
  <view class="musicControl">
    <text class="iconfont icon-iconsMusicyemianbofangmoshiShuffle"></text>
 
    <text class="iconfont icon-shangyishou" id="pre" bindtap="handleSwitch"></text>
 
    <text class="iconfont {{isPlay?'icon-zanting': 'icon-bofang'}} big" bindtap="handleMusicPlay"></text>
 
    <text class="iconfont icon-next" id="next" bindtap="handleSwitch"></text>
 
    <text class="iconfont icon-iconsMusicyemianbofangmoshiPlayList"></text>
  </view>
</view>

/* pages/songDetail/songDetail.wxss */
@import "/static/iconfont/iconfont.wxss";
page {
  height: 100%;
}
.songDetailContainer{
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
}
/* 底座 */
.circle {
  position: relative;
  z-index: 100;
  width: 60rpx;
  height: 60rpx;
  border-radius: 50%;
  background: #fff;
  margin: 10rpx 0;
}
/* 摇杆 */
.needle{
  position: relative;
  z-index: 99;
  top:-40rpx;
  left: 60rpx;
  width:192rpx;
  height:274rpx;
  /* 要先设置好旋转的中心点 */
  transform-origin:40rpx 0;
  transform: rotate(-20deg);
  transition: transform 1s;
}
/* 播放时摇杆动画 */
.needleRotate{
  transform: rotate(0deg);
}
/* 磁盘 */
.discContainer{
  position: relative;
  top:-170rpx;
  width: 598rpx;
  height: 598rpx;
}
.discAnimation{
  animation: disc 3s linear infinite;
  animation-delay:1s;
}
/*
  @keyframes：设置动画帧
  1、from to 
    使用于简单的动画，只有起始帧和结束帧
  2、百分比
    多用于复杂的动画，动画不止两帧
*/
@keyframes disc{
  from{
    transform: rotate(0deg);
  }
  to{
    transform: rotate(360deg);
  }
}
.disc{
  width: 598rpx;
  height: 598rpx;
}
.musicImg{
  position: absolute;
  top:0;
  right:0;
  bottom:0;
  left:0;
  margin: auto;
  width: 370rpx;
  height: 370rpx;
  border-radius: 50%;
}
/* 底部控制区域 */
.musicControl {
  position: absolute;
  bottom: 40rpx;
  left: 0;
  border-top: 1rpx solid #fff;
  width: 100%;
  display: flex;
}
.musicControl  text {
  width: 20%;
  height: 120rpx;
  line-height: 120rpx;
  text-align: center;
  color: #fff;
  font-size: 50rpx;
}
.musicControl  text.big{
  font-size: 80rpx;
}
/* 进度条控制区域 */
.progressControl {
  position: absolute;
  bottom: 200rpx;
  width: 640rpx;
  height: 80rpx;
  line-height: 80rpx;
  display: flex;
}
.barControl {
  position: relative;
  width: 450rpx;
  height: 4rpx;
  background: rgba(0, 0, 0, 0.4);
  margin: auto;
}
.audio-currentTime-Bar {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  height: 4rpx;
  background: red;
}
/* 小圆球 */
.audio-circle {
  position: absolute;
  right: -12rpx;
  top: -4rpx;
  width: 12rpx;
  height: 12rpx;
  border-radius: 50%;
  background: #fff;
}

// pages/songDetail/songDetail.js
import request from '../../../utils/request'
import PubSub from 'pubsub-js'
import moment from 'moment'
//获取全局实例
const appInstance = getApp();
Page({
 
  /**
   * 页面的初始数据
   */
  data: {
     isPlay:false,  //播放状态
     song:{},//歌曲详情对象
     musicId:'', //音乐id
     musicLink:'',//音乐的链接
     currentTime:'00:00',//实时时间
     durationTime:'00:00',//总时长
     currentWidth:0, //实时进度条宽度
  },
 
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: function (options) {
    //options:用于接收路由跳转的query参数
    //原生小程序中路由传参，对参数的长度有限制，如果长度过长会自动截取掉
    
    // console.log(options)
    // console.log(musicId)
    let musicId = options.musicId;
    this.setData({
      musicId
    })
    //获取音乐详情
    this.getMusicInfo(musicId);
    /**
     * 问题：如果用户操作系统的控制音乐播放/暂停的按钮，页面不知道，导致页面是否播放的状态和真实的音乐播放状态不一致
     * 解决方案：
     *   通过控制音频的实例backgroundAudioManager 去监视音乐暂停播放/暂停
     */
 
    //判断当前页面音乐是否在播放
    if(appInstance.globalData.isMusicPlay && appInstance.globalData.musicId
     === musicId){
       //修改当前页面音乐播放状态为true
       this.setData({
         isPlay:true
       })
    }
    //创建控制音乐播放的实例
    this.backgroundAudioManager = wx.getBackgroundAudioManager();
    //监视音乐播放/暂停/停止
    this.backgroundAudioManager.onPlay(()=>{
      //修改音乐是否播放的状态
      this.changePlayState(true);
      //修改全局音乐播放的状态
      appInstance.globalData.musicId = musicId;
    });
    this.backgroundAudioManager.onPause(() => {
      this.changePlayState(false);   
    });
    this.backgroundAudioManager.onStop(() => {
      this.changePlayState(false);    
    });
    //监听音乐自然播放结束
    this.backgroundAudioManager.onEnded(() => {
     //自动切换至下一首音乐，并且自动播放
      PubSub.publish('switchType','next')
     //将实时进度条还原成0
     this.setData({
       currentWidth:0,
       currentTime: '00:00'
     })
 
    })
 
    //监听音乐实时播放的进度
    this.backgroundAudioManager.onTimeUpdate(()=>{
      //格式化实时播放时间
      let currentTime = moment(this.backgroundAudioManager.currentTime*1000).format('mm:ss')
      let currentWidth = this.backgroundAudioManager.currentTime / this.backgroundAudioManager.duration*450
      this.setData({
        currentTime,
        currentWidth
      })
    })
  },
  //修改播放状态的功能函数
  changePlayState(isPlay){
    this.setData({
      isPlay
    })
    //修改全局音乐播放的状态
    appInstance.globalData.isMusicPlay = isPlay;
  },
 
  //获取音乐详情的功能函数
  async getMusicInfo(musicId){
    let songData = await request('/song/detail',{ids:musicId});
    //songData.songs[0].dt 单位ms
    let durationTime = moment(songData.songs[0].dt).format('mm:ss')
    this.setData({
      song:songData.songs[0],
      durationTime
    })
    //动态修改窗口标题
    wx.setNavigationBarTitle({
      title:this.data.song.name
    })
 
  },
  //点击播放/暂停的回调
  handleMusicPlay(){
    let isPlay = !this.data.isPlay;
    // //修改是否播放的状态
    // this.setData({
    //   isPlay
    // })
    let {musicId,musicLink} = this.data;
    this.musicControl(isPlay,musicId,musicLink);
  },
  
  //控制音乐播放/暂停的功能函数
  async musicControl(isPlay, musicId, musicLink){
    
      if(isPlay){  //音乐播放
        if(!musicLink){
          //获取音乐播放链接
          let musicLinkData = await request('/song/url', { id: musicId });
          musicLink = musicLinkData.data[0].url;
          this.setData({
            musicLink
          })
        }
      
      this.backgroundAudioManager.src = musicLink;
      this.backgroundAudioManager.title = this.data.song.name;
     }else{  //暂停音乐      
      this.backgroundAudioManager.pause();
     }
  },
  //点击切换上一首下一首的回调
  handleSwitch(event){
    //获取切歌的类型
    let type = event.currentTarget.id;
    //关闭当前播放的音乐
    this.backgroundAudioManager.stop()
    //订阅来自recommendsong页面发布的musicId消息
    PubSub.subscribe('musicId',(msg,musicId)=>{
       // console.log(musicId)
    
    //获取音乐详情信息
    this.getMusicInfo(musicId)
    //自动播放切换的当前音乐
    this.musicControl(true,musicId)
    //取消订阅
    PubSub.unsubscribe('musicId')
    })
    //发布消息数据给recommendSong
    PubSub.publish('switchType',type)
 
  },
})