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yoshop-wechat/utils/countdown.js

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// 工具类
import util from './util.js';
/**
* 倒计时类
*/
module.exports = {
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// 计时器句柄
countIds: {},
start(countId, app, dataIndex, endCallBack) {
// console.log('start')
this.onSetTimeList(countId, app, dataIndex, endCallBack, 0)
},
onSetTimeList(countId, app, dataIndex, endCallBack, deep = 0) {
const _this = this;
// 获取倒计时数据对象
const countDownObj = app.data[dataIndex]
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// 获取当前时间,同时得到活动结束时间数组
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const newTime = new Date().getTime()
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// 对结束时间进行处理渲染到页面
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const endTime = new Date(util.format_date(countDownObj.date)).getTime();
// 初始化倒计时数据
countDownObj.dynamic = {
// day: '00',
hou: '00',
min: '00',
sec: '00'
};
// 如果活动未结束,对时间进行处理
if (endTime - newTime > 0) {
const diffTime = (endTime - newTime) / 1000;
// 获取时、分、秒
// day = parseInt(diffTime / 86400),
const hou = parseInt(diffTime / 3600),
min = parseInt(diffTime % 3600 / 60),
sec = parseInt(diffTime % 3600 % 60);
countDownObj.dynamic.hou = _this.timeFormat(hou)
countDownObj.dynamic.min = _this.timeFormat(min)
countDownObj.dynamic.sec = _this.timeFormat(sec)
}
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// 渲染,然后每隔一秒执行一次倒计时函数
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app.setData({
[`${dataIndex}`]: countDownObj
})
// 判断倒计时是否结束
const isEnd = _this.isEnd(countDownObj);
// 结束后执行回调函数
isEnd && deep > 0 && endCallBack && endCallBack();
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// 重复执行
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_this.countIds[countId] && clearTimeout(_this.countIds[countId])
if (!isEnd) {
_this.countIds[countId] = setTimeout(() => {
_this.onSetTimeList(countId, app, dataIndex, endCallBack, ++deep)
}, 1000)
}
},
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/**
* 判断倒计时是否结束
* @param {*} countDownObj
*/
isEnd(countDownObj) {
const {
dynamic
} = countDownObj
if (dynamic.hou == '00' && dynamic.min == '00' && dynamic.sec == '00') {
return true
}
return false
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},
/**
* 小于10的格式化函数
*/
timeFormat(param) {
return param < 10 ? '0' + param : param;
},
};