微信小程序音乐播放器开发

 <view class='audiosBox'>
  <view class="audioOpen" bindtap="listenerButtonPlay" wx:if="{{!isOpen}}">
   <image class='image2' src="../../images/play.png" />
  </view>
  <view class="audioOpen" bindtap="listenerButtonPause" wx:if="{{isOpen}}">
   <image src="../../images/pauses.png" />
  </view>
  <view class='slid'>
   <slider bindchange="sliderChange" block-size="12px" step="2" value="{{offset}}" max="{{max}}" selected-color="#4c9dee" />
   <view>
    <text class='times'>{{starttime}}</text> <!-- 进度时长 -->
    
    <text class='times'>{{duration}}</text>  <!-- 总时长 -->
   </view>
  </view>
</view>

//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")
 },
})

/**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;
 
}