微信小程序实现时间进度条功能

关于答题类，或者一些游戏环节的小程序需要用到时间进度条，该功能怎么实现？看下面源码

<view class='out' style='margin-top:10px'> <view class='in' style='width:{{progressWidth}}%'></view></view><view class='caozuo'> <text>{{progressTime}}秒</text> <text bindtap='playbtn' data-change='1'>{{playPausetips}}</text></view>

CSS:

.out {margin-left:auto;margin-right:auto;width:250px;height:20px;border:1px solid red;border-radius:20px;overflow:hidden;}.in {height:100%;background-color:red;}.caozuo{font-size:14px;color:#333;margin-left:auto;margin-right:auto;width:250px;margin-top:10px;display: flex;justify-content:space-between}

JS:

Page({ data: {  progressWidth:0,  progressTime:60,  mark:true,  playPausetips:"开始" }, playbtn() {  let that = this;  let mark = that.data.mark;  if (mark){   that.timer = setInterval(that.run, 1000); //that.timer关键点   wx.showToast({    title: '开始',   })   that.setData({    mark:false,    playPausetips:"暂停"   })  }else{   clearInterval(that.timer);   wx.showToast({    title: '暂停',   })   that.setData({    mark: true,    playPausetips: "开始"   })  } }, run(){  let that = this;  let totalProgressTime = 60 //秒  let progressWidth = that.data.progressWidth; //显示进度  let progressTime = that.data.progressTime; //时间   if (progressWidth === 100) {   wx.showToast({    title: '结束回调处理',   })   clearInterval(that.timer);   that.setData({    progressTime: totalProgressTime,  //进度条需要总时间s    progressWidth: 100, //进度100%    progressTime: 60   })   return;  }  progressTime--;  progressWidth = (totalProgressTime - progressTime) * (100 / 60)  that.setData({   progressWidth: progressWidth,   progressTime: progressTime  }) } })

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