小程序视频或音频自定义可拖拽进度条的示例代码

<video id="myVideo" src="http://wxsnsdy.tc.qq.com/105/20210/snsdyvideodownload?filekey=30280201010421301f0201690402534804102ca905ce620b1241b726bc41dcff44e00204012882540400&bizid=1023&hy=SH&fileparam=302c020101042530230204136ffd93020457e3c4ff02024ef202031e8d7f02030f42400204045a320a0201000400" enable-danmu danmu-btn controls="{{false}}" autoplay='{{true}}' bindtimeupdate="videoUpdate" objectFit="fill"></video>
<view class='process-container'>
  <image src='{{playStates ? "../../assets/image/pause_icon.png" : "../../assets/image/play_icon.png"}}' class='video-controls-icon' bindtap='videoOpreation'></image>
   <view class='slider-container'>
   <slider bindchange="sliderChange" bindchanging="sliderChanging" step="1" value="{{sliderValue}}" backgroundColor="#A8A8A8" activeColor="#FFEE83" block-color="#FFEE83"  />
  </view> 
</view>

 data: {
  sliderValue: 0, //控制进度条slider的值，
  updateState: false, //防止视频播放过程中导致的拖拽失效
  playStates: true //控制播放 & 暂停按钮的显示
 },

 onReady: function () {
  this.videoContext = wx.createVideoContext('myVideo');
  this.setData({
   updateState: true
  })
 },

 videoUpdate(e) {
  if (this.data.updateState) { //判断拖拽完成后才触发更新，避免拖拽失效
   let sliderValue = e.detail.currentTime / e.detail.duration * 100;
   this.setData({
    sliderValue,
    duration: e.detail.duration
   })
  }
 },

 sliderChanging(e) {
  this.setData({
   updateState: false //拖拽过程中，不允许更新进度条
  })
 },
 sliderChange(e) {
  if (this.data.duration) {
   this.videoContext.seek(e.detail.value / 100 * this.data.duration); //完成拖动后，计算对应时间并跳转到指定位置
   this.setData({
    sliderValue: e.detail.value,
    updateState: true //完成拖动后允许更新滚动条
   })
  }
 },

 videoOpreation() {
  this.data.playStates ? this.videoContext.pause() : this.videoContext.play();
  this.setData({
   playStates: !this.data.playStates
  })
 },