代码片段

https://developers.weixin.qq.com/s/GSjXzCmI7BH5

index.js 定义倒计时秒数

data: {
    list: [
      { time: 900 }，
      { time: 600 }，
      { time: 300 }，
      { time: 800 }，
    ]
  },
index.wxml

  


倒计时自定义组件中接收数据
 properties: {
    title: {
      type: String,
      value: '倒计时',
      observer(n, o, c) {}
    },
    time: {
      type: Number,
      value: 0,
      observer(n, o, c) {}
    }
  },
倒计时自定义组件中的方法
countdowns(){
      var timeNow = that.data.timeNow; //properties接收的time赋值给data中的timeNow
      var minute=Math.floor(timeNow  / 60 );
      var second=timeNow  % 60
      second<10?second='0'+second:'';
      that.setData({
          countdown:minute+'分'+second+'秒',
          timeNow: that.data.timeNow-1
      })
      setTimeout(that.countdowns, 1000);
    },

其中取到的秒数也很奇怪，救一下