小程序商品详情页面设计与功能实现（包括倒计时）

1、完整功能和页面

 放在前面：除了wxss样式没有注释，其余代码都注释很详细啦，根据命名也能正常阅读~

 2、goods.wxml代码

  
    
    
      
        
          
        
      
    
    
    
      
        
        {{goodsInfo.current_price}} 
        
        {{clock}}
        {{clock}}
      

      
        起拍价 {{goodsInfo.start_price}}
        
          {{publisher.nickName}} 
      

      
         {{goodsInfo.name}} 
      
    
    
    
      
        出价记录
      
      
      
        
          {{item.auctionTimeFormat}}
          
           {{item.userInfo.nickName}} 出价了
          {{item.putPrice}} 元
        
      

    
    
    
      {{goodsInfo.describe}}
    
  
  
  
    
      
      {{changePrice}}元
      
      出个价
    
  

　　

3、goods.wxss代码

.container {
  bottom: 0;
  top: 0;
  left: 0;
  right: 0;
  position: fixed;
  width: 100%;
  height: 100%;
  background-color: rgba(232, 234, 235, 0.89);
}

.main {
  width: 100%;
  height: 93%;
  top: 0;
  position: absolute;
  flex: 1;
  background-color: rgb(221, 221, 204);
}

swiper {
  height: 430rpx;
  background-color: white;
}

swiper-item {
  text-align: center;
  width: 100%;
  height: 100%;
}

swiper-item image {
  border-radius: 15rpx;
  height: 100%;
}

.goodsPrice {
  margin-top: 15rpx;
  width: 96%;
  margin-left: 2%;
  border-radius: 25rpx;
  border: aliceblue solid 1px;
  background-color: aliceblue;
  box-shadow: 4px 4px 15px rgb(180, 223, 202);
}

.goodsAuctionRecord {
  margin-top: 15rpx;
  width: 96%;
  height: auto;
  margin-left: 2%;
  border-radius: 25rpx;
  border: rgb(235, 238, 241) solid 1px;
  background-color: aliceblue;
  box-shadow: 4px 4px 15px rgb(180, 223, 202);
}

.describe {
  margin-top: 15rpx;
  width: 96%;
  margin-left: 2%;
  border-radius: 25rpx;
  border: rgb(235, 238, 241) solid 1px;
  background-color: aliceblue;
  box-shadow: 4px 4px 15px rgb(180, 223, 202);
}

.bottomContainer {
  position: absolute;
  top: 93%;
  width: 100%;
  height: 5%;
  white-space: nowrap;
  word-break:keep-all;
}

.addPrice {
  position: fixed;
  background-color: rgb(8, 8, 8);
  color: white;
  border-radius: 30px;
  margin-left: 4%;
  margin-top: 17rpx;
  padding: 10rpx 10% 10rpx 10%;
}
.changePriceIcon{
  width: 60rpx;
  height: 60rpx;
  margin-left: 4%;
  padding-top: 12rpx;
}

　　

4、goods.js代码

var goods_id
var myTime //计数器
Page({

  data: {
    goodsInfo: null,
    publisher: null,
    auctionRecord: null,
    clock: '',
    changePrice: null //出价
  },

  onLoad(options) {
    let goodsId = options.goodsid
    //将id存起来给onshow用
    goods_id = goodsId
    //获取商品信息
    this.getGoodsInfo(goodsId)
    //倒计时
    this.countdown(goodsId)
  },
  onShow() {
    this.getGoodsInfo(goods_id)
    this.getAuctionRecord()
  },
  onUnload() {
    //清楚计时器
    clearInterval(myTime)
  },
  onHide() {
    //清楚计时器
    clearInterval(myTime)
  },

  //查询所有商品
  getGoodsInfo(goodsId) {
    wx.cloud.database().collection('goods').doc(goodsId).get({
      success: (res) => {
        this.setData({
          goodsInfo: res.data,
          changePrice: res.data.current_price + 1
        })
        //根据发布者id去用户表中查询商品发布者信息
        wx.cloud.database().collection('userInfo').doc(res.data.publisher_id).get({
          success: (res) => {
            this.setData({
              publisher: res.data
            })
          }
        })
      }
    })
  },
  //底部加减价格
  addPrice() {
    var price = this.data.changePrice
    price++
    this.setData({
      changePrice: price
    })
  },
  downPrice() {
    var price = this.data.changePrice
    if (price > this.data.goodsInfo.current_price + 1) {
      price--
      this.setData({
        changePrice: price
      })
    } else {
      wx.showToast({
        title: '出价应当高于当前价！',
        icon: 'none'
      })
    }
  },

  //竞拍者出价
  putPrice() {
    //获取出价
    let price = this.data.changePrice
    //获取出价用户
    let userInfo = wx.getStorageSync('userInfo')
    //获取出价时间
    let nowTime = new Date().getTime()
    //转化为时间格式
    var util = require("../../util/time_transform.js")
    let timeFormat = util.js_date_time(nowTime)
    //弹窗确认
    wx.showModal({
      title: '确认出价',
      content: '价高者得，竞拍结束价高者可在竞拍记录中查看卖家联系信息，感谢您的参与！',
      success: (res) => {
        if (res.confirm) {
          wx.showLoading({
            title: '正在出价...',
          })
          //保存竞拍记录到数据库
          wx.cloud.database().collection('goodsAuctionRecord').add({
              data: {
                goodsID: goods_id,
                userInfo: userInfo,
                putPrice: price,
                auctionTime: nowTime,
                auctionTimeFormat: timeFormat
              },
              success: res => {}
            }),
            //更新当前价
            wx.cloud.database().collection('goods').doc(goods_id).update({
              data: {
                current_price: price
              }
            })
          let _this = this
          setTimeout(function () {
            wx.hideLoading({
              success: (res) => {
                //刷新页面数据
                _this.onShow()
              }
            })
          }, 1000)
        } else {
          console.log('取消')
        }
      }
    })
  },

  //获取商品用户竞拍记录
  getAuctionRecord() {
    wx.cloud.database().collection('goodsAuctionRecord').where({
      goodsID: goods_id
    }).get({
      success: (res) => {
        this.setData({
          auctionRecord: res.data
        })
      }
    })
  },

  //获取竞拍结束时间，并计算倒计时
  countdown(goodsId) {
    wx.cloud.database().collection('goods').doc(goodsId).get({
      success: res => {
        //取出竞拍结束时间，精确到秒
        let auctionEndtime = res.data.end_time
        console.log(res)
        //获取当前系统时间,只精确到秒
        var nowTime = new Date().getTime() / 1000
        //剩余时间总的秒数
        var totalSecond = Math.floor(auctionEndtime - nowTime)
        console.log('剩余秒数', totalSecond)
        //计算倒计时
        this.doCountdown(totalSecond)
      }
    })
  },

  //计算商品倒计时
  doCountdown(totalSecond) {
    let _this = this
    //每隔一秒执行一次代码
    myTime = setInterval(function () {
      //如果竞拍已经结束
      if (totalSecond < 0) {
        _this.setData({
          clock: '已经截止'
        })
        clearInterval(myTime)
        return
      } else {
        //执行计算
        var time = _this.formatTime(totalSecond)
        _this.setData({
          clock: '剩余' + time
        })
      }
      totalSecond--;
    }, 1000)
  },

  //倒计时时间格式化
  formatTime(totalSecond) {
    //剩余天数
    var day = Math.floor(totalSecond / 3600 / 24)
    //n天后剩余小时数
    var hour = Math.floor(totalSecond / 3600 % 24)
    //n天n小时后剩余分钟数
    var min = Math.floor(totalSecond / 60 % 60)
    //n天n小时n分钟后剩余秒数
    var sec = Math.floor(totalSecond % 60)
    return day + "天" + hour + "小时" + min + "分" + sec + "秒"
  }
})

5、时间转化js代码

 在util 下面新建一个time_transform.js文件

//时间戳转换成日期时间，传入时间精确到毫秒
function js_date_time(unixtime) {
  var date = new Date(unixtime) 
  var y = date.getFullYear();
  var m = date.getMonth() + 1;
  m = m < 10 ? ('0' + m) : m;
  var d = date.getDate();
  d = d < 10 ? ('0' + d) : d;
  var h = date.getHours();
  h = h < 10 ? ('0' + h) : h;
  var minute = date.getMinutes();
  var second = date.getSeconds();
  minute = minute < 10 ? ('0' + minute) : minute;
  second = second < 10 ? ('0' + second) : second;
  return y + '-' + m + '-' + d + ' ' + h + ':' + minute + ':' + second;//年月日时分秒
  // return y + '-' + m + '-' + d + ' ' + h + ':' + minute;
  // return y + '-' + m + '-' + d;
}
module.exports = {
  js_date_time: js_date_time
}