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微信小程序?qū)崿F(xiàn)訂單倒計(jì)時(shí)

更新時(shí)間：2020年11月01日 14:19:16 作者：圓角50%

這篇文章主要為大家詳細(xì)介紹了微信小程序?qū)崿F(xiàn)訂單倒計(jì)時(shí)，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了微信小程序?qū)崿F(xiàn)訂單倒計(jì)時(shí)的具體代碼，供大家參考，具體內(nèi)容如下

之前在做一個(gè)有拼團(tuán)功能項(xiàng)目的時(shí)候遇到過(guò)倒計(jì)時(shí)的問(wèn)題，由于當(dāng)時(shí)技術(shù)不熟在這方面耽擱了好些時(shí)間，所以這里整理出來(lái)希望能為后來(lái)人提供些許啟發(fā)。

1.實(shí)現(xiàn)思路

求出發(fā)起拼團(tuán)時(shí)間與拼團(tuán)結(jié)束時(shí)間的時(shí)間差
再將時(shí)間差格式化得到我們想要的格式如：

時(shí)間每秒遞減使用了 setTimeout(this.setTimeCount,1000);這個(gè)函數(shù)，讓這個(gè)函數(shù)每隔一秒執(zhí)行一次。

效果圖：

2.實(shí)現(xiàn)中的難點(diǎn)

若是要實(shí)現(xiàn)單個(gè)倒計(jì)時(shí)如60s發(fā)送驗(yàn)證碼倒不是很難，難的是多條倒計(jì)時(shí)。

不同的訂單下單時(shí)間是不一樣的時(shí)間差time也就不一樣，所以當(dāng)初在這卡了很久，后來(lái)想通一切才覺(jué)得原來(lái)如此。

實(shí)現(xiàn)方法1：是后臺(tái)計(jì)算出時(shí)間前端直接獲取時(shí)間差，當(dāng)時(shí)為了不影響項(xiàng)目進(jìn)度我們用的就是這個(gè)方法，真是苦了那個(gè)些后臺(tái)的兄弟還得遷就我這個(gè)菜鳥(niǎo)。

獲取這個(gè)時(shí)間差time后我們就可以將它處理后放入數(shù)組循環(huán)。這樣做的好處是前端不用將time作為一個(gè)屬性添加到原數(shù)組中。

index.wxml

<view class="item">單條倒計(jì)時(shí):{{time}}</view>
 <view class="item">多條倒計(jì)時(shí)</view>
 <view class='no'>暫無(wú)任何記錄</view>
 <view class="content">
 <block wx:for="{{listData}}"wx:key="idx" wx:for-item="item" wx:for-index="{{idx}}">
 <view class="tip {{item.time<=0?'isShow':''}}">
 <view class="dis">
 <view class='dis_time left'>剩余時(shí)間：{{item.countDown}}</view>
 </view>
 </view>
 </block>
</view>

index.wxss

page{
 height:100%;
 background: #fff;
 position: relative;
}
.item{
 height:4%;
 background: #fff;
 text-align: center;
}
.content{
 border:1px solid rgb(167, 159, 159);
 background: #F6F8F8;
 margin-bottom:300rpx;
 border-bottom: none;
}
.no{
 text-align: center;
 position: absolute;
 top:8%;
 z-index: -11;
}
.tip{ 
 position: relative;
 background: #fff;
 width:100%;
 height:100rpx;
 margin-bottom: 5rpx;
 padding:20rpx 0;
 border-bottom: 1px solid gainsboro;
}
.isShow{
 display:none;
}
.dis{
 width:100%;
 font-size: 35rpx;
 color:#009FE5;
 box-sizing: border-box;
}
.dis_time{
 width:50%;
}

index.js

Page({
 /**
 * 頁(yè)面的初始數(shù)據(jù)
 */
 data: {
 pingData: [
 {
 "id": "1",
 "icon": "../../images/image2.jpg",
 "number": "20",
 "pingTime": "2019-3-28 23:30:00",
 "time": "55267",
 "showList": "false",
 },
 {
 "id": "2",
 "icon": "../../images/image3.jpg",
 "number": "4566",
 "pingTime": "2019-3-28 12:30:00",
 "time": "58934",
 "showList": "false",
 },
 {
 "id": "3",
 "icon": "../../images/image2.jpg",
 "number": "20",
 "pingTime": "2019-3-28 08:30:00",
 "time": "555234",
 "showList": "false",
 }
 ],
 time:"30"
 },
 /**
 * 生命周期函數(shù)--監(jiān)聽(tīng)頁(yè)面加載
 */
 onLoad: function (options) {
 var that = this
 that.setData({
  listData: that.data.pingData
 })
 that.setCountDown(); 
 that.setTimeCount();
 },
 /**
 * 60s倒計(jì)時(shí)
 */
 setTimeCount:function(){
 let time=this.data.time
 time--;
 if (time <= 0) {
 time = 0;
 }
 this.setData({
 time:time
 })
 setTimeout(this.setTimeCount,1000);
 },
 /**
 * 倒計(jì)時(shí)
 */
 setCountDown: function () {
 let time = 1000;
 let { listData } = this.data;
 let list = listData.map((v, i) => {
 if (v.time <= 0) {
 v.time = 0;
 }
 let formatTime = this.getFormat(v.time);
 v.time -= time;
 v.countDown = `${formatTime.hh}:${formatTime.mm}:${formatTime.ss}`;
 return v;
 })
 this.setData({
 listData: list
 });
 setTimeout(this.setCountDown, time);
 },
 /**
 * 格式化時(shí)間
 */
 getFormat: function (msec) {
 let ss = parseInt(msec / 1000);
 let ms = parseInt(msec % 1000);
 let mm = 0;
 let hh = 0;
 if (ss > 60) {
 mm = parseInt(ss / 60);
 ss = parseInt(ss % 60);
 if (mm > 60) {
 hh = parseInt(mm / 60);
 mm = parseInt(mm % 60);
 }
 }
 ss = ss > 9 ? ss : `0${ss}`;
 mm = mm > 9 ? mm : `0${mm}`;
 hh = hh > 9 ? hh : `0${hh}`;
 return { ss, mm, hh };
 }
})

實(shí)現(xiàn)方法2：本著不想做菜鳥(niǎo)的心情，我在項(xiàng)目完成后由研究了下當(dāng)初未完成的方法，即前端計(jì)算出時(shí)間差并將時(shí)間差數(shù)組作為原數(shù)組的屬性加入循環(huán)遍歷。當(dāng)初一直不知如何在原數(shù)組中再添加一個(gè)數(shù)組作為它的一個(gè)屬性。
在之前的基礎(chǔ)上將time時(shí)間差作為一個(gè)屬性放到原數(shù)組中

關(guān)鍵代碼如下：

var pinData = that.data.pingData
 for (var i = 0; i < pinData.length;i++){
 console.log("計(jì)算出長(zhǎng)度為" + pinData.length)
 var endtime = that.data.pingData[i].pingTime
 console.log("計(jì)算出長(zhǎng)度為" + endtime)
 that.queryTime(endtime)
 var time ="pingData["+i+"].time"
 that.setData({
 [time]:that.queryTime(endtime),
 listData:pinData
 })
 }

新增計(jì)算時(shí)間差的方法：

queryTime:function(pintime){
 var start_date = new Date();
 var end_date = new Date(pintime.replace(/-/g, "/"));
 var days = end_date.getTime() - start_date.getTime();
 console.log("獲取到時(shí)間差" + days)
 return days;
 }

之前困惑我的地方就是如何將時(shí)間差這個(gè)數(shù)組添加到原來(lái)的數(shù)組中，現(xiàn)在想想思路清晰，曾經(jīng)的難題也不過(guò)爾爾。

index.js方法二修改后的代碼

Page({
 /**
 * 頁(yè)面的初始數(shù)據(jù)
 */
 data: {
 pingData: [
 {
 "id": "1",
 "icon": "../../images/image2.jpg",
 "number": "20",
 "pingTime": "2019-4-15 23:30:00",
 "time": "55267",
 "showList": "false",
 },
 {
 "id": "2",
 "icon": "../../images/image3.jpg",
 "number": "4566",
 "pingTime": "2019-4-13 12:30:00",
 "time": "58934",
 "showList": "false",
 },
 {
 "id": "3",
 "icon": "../../images/image2.jpg",
 "number": "20",
 "pingTime": "2019-4-13 08:30:00",
 "time": "555234",
 "showList": "false",
 }
 ],
 time:"60"
 },
 /**
 * 生命周期函數(shù)--監(jiān)聽(tīng)頁(yè)面加載
 */
 onLoad: function (options) {
 var that = this
 var pinData = that.data.pingData
 for (var i = 0; i < pinData.length;i++){
 console.log("計(jì)算出長(zhǎng)度為" + pinData.length)
 var endtime = that.data.pingData[i].pingTime
 console.log("計(jì)算出長(zhǎng)度為" + endtime)
 that.queryTime(endtime)
 var time ="pingData["+i+"].time"
 that.setData({
 [time]:that.queryTime(endtime),
 listData:pinData
 })
 }
 that.setCountDown(); 
 that.setTimeCount();
 },

 /**
 * 60s倒計(jì)時(shí)
 */
 setTimeCount:function(){
 let time=this.data.time
 time--;
 if (time <= 0) {
 time = 0;
 }
 this.setData({
 time:time
 })
 setTimeout(this.setTimeCount,1000);
 },
 /**
 * 倒計(jì)時(shí)
 */
 setCountDown: function () {
 let time = 1000;
 let { listData } = this.data;
 let list = listData.map((v, i) => {
 if (v.time <= 0) {
 v.time = 0;
 }
 let formatTime = this.getFormat(v.time);
 v.time -= time;
 v.countDown = `${formatTime.hh}:${formatTime.mm}:${formatTime.ss}`;
 return v;
 })
 this.setData({
 listData: list
 });
 setTimeout(this.setCountDown, time);
 },
 /**
 * 格式化時(shí)間
 */
 getFormat: function (msec) {
 let ss = parseInt(msec / 1000);
 let ms = parseInt(msec % 1000);
 let mm = 0;
 let hh = 0;
 if (ss > 60) {
 mm = parseInt(ss / 60);
 ss = parseInt(ss % 60);
 if (mm > 60) {
 hh = parseInt(mm / 60);
 mm = parseInt(mm % 60);
 }
 }
 ss = ss > 9 ? ss : `0${ss}`;
 mm = mm > 9 ? mm : `0${mm}`;
 hh = hh > 9 ? hh : `0${hh}`;
 return { ss, mm, hh };
 },
 queryTime:function(pintime){
 var start_date = new Date();
 var end_date = new Date(pintime.replace(/-/g, "/"));
 var days = end_date.getTime() - start_date.getTime();
 console.log("獲取到時(shí)間差" + days)
 return days;
 }
})

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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