微信小程序：音乐播放器开发（进度条可拖拽）

前言 

这篇文章上一版本是用audio组件开发的播放器,随后反应音频加载速度慢的问题

又用小程序内置的背景音乐播放的方法写了一遍,逻辑是一样的逻辑,希望对大家有所帮助！

    
      
    
    
      
    
    
      
      
        {{starttime}} 
       
        {{duration}}   
      
    

js部分注意了：bug ios 播放时必须加title 不然会报错导致音乐不播放

//index.js
//获取应用实例
const bgMusic = wx.getBackgroundAudioManager()
const app = getApp()

Page({
  data: {
    isOpen: false,//播放开关
    starttime: '00:00', //正在播放时长
    duration: '06:41',   //总时长
    src:"http://ws.stream.qqmusic.qq.com/M500001VfvsJ21xFqb.mp3?guid=ffffffff82def4af4b12b3cd9337d5e7&uin=346897220&vkey=6292F51E1E384E061FF02C31F716658E5C81F5594D561F2E88B854E81CAAB7806D5E4F103E55D33C16F3FAC506D1AB172DE8600B37E43FAD&fromtag=46"
  },
  // 播放
  listenerButtonPlay: function () {
    var that = this
    //bug ios 播放时必须加title 不然会报错导致音乐不播放
    bgMusic.title = '此时此刻'  
    bgMusic.epname = '此时此刻'
    bgMusic.src = that.data.src;
    bgMusic.onTimeUpdate(() => { 
      //bgMusic.duration总时长  bgMusic.currentTime当前进度
      console.log(bgMusic.currentTime)
      var duration = bgMusic.duration; 
      var offset = bgMusic.currentTime;  
      var currentTime = parseInt(bgMusic.currentTime);
      var min = "0" + parseInt(currentTime / 60);
      var max = parseInt(bgMusic.duration);
      var sec = currentTime % 60;
      if (sec < 10) {
        sec = "0" + sec;
      };
      var starttime = min + ':' + sec;   /*  00:00  */
      that.setData({
        offset: currentTime,
        starttime: starttime,
        max: max,
        changePlay: true
      })
    })
    //播放结束
    bgMusic.onEnded(() => {
      that.setData({
        starttime: '00:00',
        isOpen: false,
        offset: 0
      })
      console.log("音乐播放结束");
    })
    bgMusic.play();
    that.setData({
      isOpen: true,
    })
  },
  //暂停播放
  listenerButtonPause(){
     var that = this
    bgMusic.pause()
    that.setData({
      isOpen: false,
    })
  },
  listenerButtonStop(){
    var that = this
    bgMusic.stop()
  },
  // 进度条拖拽
  sliderChange(e) {
    var that = this
    var offset = parseInt(e.detail.value);
    bgMusic.play();
    bgMusic.seek(offset);
    that.setData({
      isOpen: true,
    })
  },
  // 页面卸载时停止播放
  onUnload() {
    var that = this
    that.listenerButtonStop()//停止播放
    console.log("离开")
  },
})

css部分 

/**index.wxss**/
.audiosBox{
  width: 92%;
  margin: auto;
  height: 130rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #f6f7f7;
  border-radius: 10rpx;
}
/*按钮大小  */
.audioOpen{
  width: 70rpx;
  height: 70rpx;
  border: 2rpx solid #4c9dee;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: 20rpx;
}

image{
  width: 30rpx;
  height: 40rpx;
}
.image2{
  margin-left: 10%;
}
/*进度条长度  */
.slid{
  flex: 1;
  position: relative;
}
.slid view{
  display: flex;
  justify-content: space-between;
}
.slid view>text:nth-child(1){
  color: #4c9dee;
  margin-left:6rpx; 
}
.slid view>text:nth-child(2){
  margin-right:6rpx; 
}
slider{
  width: 520rpx;
  margin: 0;
  margin-left: 35rpx;
}
/*横向布局  */
.times{
  width: 100rpx;
  text-align: center;
  display: inline-block;
  font-size: 24rpx;
  color:#999999;
  margin-top: 5rpx;
}
.title view{
  text-indent: 2em;

}

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