<template>
 <div>
  <button @click="handleClick" :disabled="disabled">
   {{btnText}}
  </button>
  <span>{{tip}}</span>
 </div>
</template>
<script>
 import moment from 'moment'
 export default {
  name: "Spike",
  props: {
   startTime: {
    required: true,
    validator: (val) => {
     return moment.isMoment(val)
    }
   },
   endTime: {
    required: true,
    validator: (val) => {
     return moment.isMoment(val)
    }
   }
  },
  data() {
   return {
    start: false,
    end: false,
    done: false,
    tip: '',
    timeGap: 0,
    btnText:""
   }
  },
   computed: {
   disabled() {
    //當三個異號的時候disable返回真，不可點擊，
    // 初始化通過this.updateState確定disable的狀態(tài)
    return !(this.start && !this.end && !this.done);
   }
  },
  async created() {
   const serverTime=await this.getServerTime();
   this.timeGap=Date.now()-serverTime;//當前時間和服務器時間差
   this.updateState();
   this.timeInterval=setInterval(()=>{
    this.updateState()
   },1000)
  },
  updated(){
   if(this.end||this.done){
    clearInterval(this.timeInterval)
   }
  },
  methods: {
   handleClick() {
    alert("提交成功");
    this.done=true;
    this.btnText="已參加過活動"
   },
   getServerTime() {
    //模擬服務器時間
    return new Promise((resolve, reject) => {
     setTimeout(() => {
      //當前時間慢10秒就是服務器時間
      resolve(new Date(Date.now() -10 * 1000).getTime())//跟本地時間差
     }, 0)
    })
   },
   updateState() {
    const now = moment(new Date(Date.now() - this.timeGap));//當前服務器時間
    const diffStart=this.startTime.diff(now);//開始時間和服務器時間之差
    const diffEnd=this.endTime.diff(now);//結束時間和服務器時間之差
    if(diffStart<0){
     this.start=true;
     this.tip="秒殺已開始";
     this.btnText="參加"
    }else{
     this.tip=`距離秒殺開始還剩${Math.ceil(diffStart/1000)}秒`;
     this.btnText="活動未開始";
    }
    if(diffEnd<=0){
     this.end=true;
     if( !this.btnText==="已參加過活動"||this.btnText==="參加"){
      this.tip="秒殺已結束";
      this.btnText="活動已結束";
     }
    }
   }
  },
  beforeDestroy() {
   clearInterval(this.timeInterval)
  }
 }
</script>
<style scoped>
 button[disabled]{
  cursor: not-allowed;
 }
</style>

<template>
 <div>
  <h1 style="color: red">設計一個秒殺倒計時的組件</h1>
  <Spike :startTime="startTime" :endTime="endTime"></Spike>
 </div>
</template>
<script>
 import Spike from './Spike'
 import moment from 'moment'
 export default {
  name: "index",
  components:{
   Spike
  },
  data(){
   return{
    endTime:moment(new Date(Date.now()+10*1000)),
    startTime:moment(new Date(Date.now()))
   }
  }
 }
</script>
<style scoped>
</style>

let goodsList = [{
 actEndTime: '2018-06-24 10:00:43'
}]
let endTimeList = [];
// 將活動的結束時間參數(shù)提成一個單獨的數(shù)組，方便操作
 this.data.mydata.rush.forEach(o => {
   endTimeList.push(o.actEndTime)
})
 this.setData({
   actEndTimeList: endTimeList
});
 // 執(zhí)行倒計時函數(shù)
 this.countDown();
timeFormat(param) { //小于10的格式化函數(shù)
  return param < 10 ? '0' + param : param;
 },
 countDown(it) { //倒計時函數(shù)
  // 獲取當前時間，同時得到活動結束時間數(shù)組
  let newTime = new Date().getTime();
  let endTimeList = this.data.actEndTimeList;
  let countDownArr = [];
  // 對結束時間進行處理渲染到頁面
  endTimeList.forEach(o => {
   let endTime = new Date(o).getTime();
   let obj = null;
   // 如果活動未結束，對時間進行處理
   if (endTime - newTime > 0) {
    let time = (endTime - newTime) / 1000;
    // 獲取天、時、分、秒
    let day = parseInt(time / (60 * 60 * 24));
    let hou = parseInt(time % (60 * 60 * 24) / 3600);
    let min = parseInt(time % (60 * 60 * 24) % 3600 / 60);
    let sec = parseInt(time % (60 * 60 * 24) % 3600 % 60);
    obj = {
     day: this.timeFormat(day),
     hou: this.timeFormat(hou),
     min: this.timeFormat(min),
     sec: this.timeFormat(sec)
    }
   } else { //活動已結束，全部設置為'00'
    obj = {
     day: '00',
     hou: '00',
     min: '00',
     sec: '00'
    }
   }
   countDownArr.push(obj);
  })
  // 渲染，然后每隔一秒執(zhí)行一次倒計時函數(shù)
  this.setData({
   countDownList: countDownArr
  })
  setTimeout(this.countDown, 1000);
 },
<view class='item-money-name'>
       <view class='item-money'>￥{{item.money}}</view>
       <view class="tui-countdown-content {{(countDownList[index].day && countDownList[index].hou && countDownList[index].min && countDownList[index].sec) == 0?'tibg':''}}">
        <text>剩余</text>
        <text class='tui-conutdown-box'>{{countDownList[index].day}}</text>
        <text>天</text>
        <text class='tui-conutdown-box'>{{countDownList[index].hou}}:</text>
        <text class='tui-conutdown-box'>{{countDownList[index].min}}:</text>
        <text class='tui-conutdown-box'>{{countDownList[index].sec}}</text>
       </view>
      </view>