微信小程序在安卓的白屏问题原因及改进讲解

/* limitCommodity是一个数组，返回的是商品对象，包含商品价格、商品结束时间、商品图片等 */
<block wx:for="{{limitCommodity}}" wx:key="{{item.id}}">
  <commodityItem class="specialContent" goods="{{item}}" />
</block>

Component({
 properties: {
  goods: Object
 },
 data: {
 },
 timer: null,
 /* 在组件实例进入页面节点树时执行，开始定时器 */
 attached: function() {
  if(this.timer) {
   clearInterval(this.timer);
  }
  this.filterTime();
  let that = this;  
  this.timer = setInterval(function () {
   that.filterTime();
  }, 1000)
 },
 /* 在组件实例被从页面节点树移除时执行，将定时器清除 */
 detached: function() {
  clearInterval(this.timer);
  this.timer = null;
 },
 methods: {
  /* 用于将时间戳转换成自定义的时间格式 */
  filterTime() {
   let totalTime = new Date(parseInt(this.data.goods.endtime) * 1000) - new Date();
   let days = parseInt(totalTime / 1000 / 60 / 60 / 24, 10);
   let hours = parseInt(totalTime / 1000 / 60 / 60 % 24, 10);
   let minutes = parseInt(totalTime / 1000 / 60 % 60, 10);
   let seconds = parseInt(totalTime / 1000 % 60, 10);
   let day = days >= 10 ? days : '0' + days;
   day = day == 0 ? '' : day + '天';
   let hour = hours >= 10 ? hours : '0' + hours;
   let minute = minutes >= 10 ? minutes : '0' + minutes;
   let second = seconds >= 10 ? seconds : '0' + seconds;
   this.setData({
    limitTime: day + hour + ":" + minute + ":" + second
   })
  },
 }
})

Component({
 properties: {
  limitCommodity:Array
 },
 data: {
 },
 timeOut:null,
 /* 在组件实例进入页面节点树时执行 */
 attached(){
  this.calculate();
 },
 /* 在组件实例被从页面节点树移除时执行，将定时器清除 */
 detached(){
  clearTimeout(this.timeOut);
  this.timeOut = null;
 },
 methods: {
  filterTime(endtime) {
   let totalTime = new Date(parseInt(endtime) * 1000) - new Date();
   let days = parseInt(totalTime / 1000 / 60 / 60 / 24, 10);
   let hours = parseInt(totalTime / 1000 / 60 / 60 % 24, 10);
   let minutes = parseInt(totalTime / 1000 / 60 % 60, 10);
   let seconds = parseInt(totalTime / 1000 % 60, 10);
   let day = days >= 10 ? days : '0' + days;
   day = day == 0 ? '' : day + '天';
   let hour = hours >= 10 ? hours : '0' + hours;
   let minute = minutes >= 10 ? minutes : '0' + minutes;
   let second = seconds >= 10 ? seconds : '0' + seconds;
   return day + hour + ":" + minute + ":" + second
  },
  calculate(){
   let limitCommodity = this.data.limitCommodity;
   for (let i = 0; i < limitCommodity.length;i++){
    limitCommodity[i]['endtime_date'] = this.filterTime(limitCommodity[i]['endtime'])
   }
   this.setData({
    limitCommodity
   })
   this.timeOut = setTimeout(()=>{
    this.calculate();
   },1000);
  }
 }
})