微信小程式中取得驗證碼倒數60s的實例分析

這篇文章主要為大家詳細介紹了微信小程式實現倒數60s獲取驗證碼，具有一定的參考價值，有興趣的小伙伴們可以參考一下

本文實例為大家分享了微信小程式倒數計時取得驗證碼的具體程式碼，供大家參考，具體內容如下

1、工具類別（引用微信小程式提供的工具類別）

countdown.js

class Countdown {
constructor(options = {}) {
Object.assign(this, {
options, 
})
this.__init()
}
/**
* 初始化
*/
__init() {
this.page = getCurrentPages()[getCurrentPages().length - 1]
this.setData = this.page.setData.bind(this.page)
this.restart(this.options)
}
/**
* 默认参数
*/
setDefaults() {
return {
date: `June 7, 2087 15:03:25`, 
refresh: 1000, 
offset: 0, 
onEnd() {}, 
render(date) {}, 
}
}
/**
* 合并参数
*/
mergeOptions(options) {
const defaultOptions = this.setDefaults()
for (let i in defaultOptions) {
if (defaultOptions.hasOwnProperty(i)) {
this.options[i] = typeof options[i] !== `undefined` ? options[i] : defaultOptions[i]
if (i === `date` && typeof this.options.date !== `object`) {
this.options.date = new Date(this.options.date)
}
if (typeof this.options[i] === `function`) {
this.options[i] = this.options[i].bind(this)
}
}
}
if (typeof this.options.date !== `object`) {
this.options.date = new Date(this.options.date)
}
}
/**
* 计算日期差
*/
getDiffDate() {
let diff = (this.options.date.getTime() - Date.now() + this.options.offset) / 1000
let dateData = {
years: 0,
days: 0,
hours: 0,
min: 0,
sec: 0,
millisec: 0,
}
if (diff <= 0) {
if (this.interval) {
this.stop()
this.options.onEnd()
}
return dateData
}
if (diff >= (365.25 * 86400)) {
dateData.years = Math.floor(diff / (365.25 * 86400))
diff -= dateData.years * 365.25 * 86400
}
if (diff >= 86400) {
dateData.days = Math.floor(diff / 86400)
diff -= dateData.days * 86400
}
if (diff >= 3600) {
dateData.hours = Math.floor(diff / 3600)
diff -= dateData.hours * 3600
}
if (diff >= 60) {
dateData.min = Math.floor(diff / 60)
diff -= dateData.min * 60
}
dateData.sec = Math.round(diff)
dateData.millisec = diff % 1 * 1000
return dateData
}
/**
* 补零
*/
leadingZeros(num, length = 2) {
num = String(num)
if (num.length > length) return num
return (Array(length + 1).join(`0`) + num).substr(-length)
}
/**
* 更新组件
*/
update(newDate) {
this.options.date = typeof newDate !== `object` ? new Date(newDate) : newDate
this.render()
return this
}
/**
* 停止倒计时
*/
stop() {
if (this.interval) {
clearInterval(this.interval)
this.interval = !1
}
return this
}
/**
* 渲染组件
*/
render() {
this.options.render(this.getDiffDate())
return this
}
/**
* 启动倒计时
*/
start() {
if (this.interval) return !1
this.render()
if (this.options.refresh) {
this.interval = setInterval(() => {
this.render()
}, this.options.refresh)
}
return this
}
/**
* 更新offset
*/
updateOffset(offset) {
this.options.offset = offset
return this
}
/**
* 重启倒计时
*/
restart(options = {}) {
this.mergeOptions(options)
this.interval = !1
this.start()
return this
}
}

export default Countdown

#2、WXML部分：

<view class="weui-cell__ft">
 <view class="weui-vcode-btn" bindtap="vcode">{{ c2 || &#39;获取验证码&#39; }}</view>
</view>

3、JS部分:

import $wuxCountDown from 'countdown/countdown'
export {
 $wuxCountDown, 
}
import { $wuxCountDown } from '../../components/wux'
 vcode: function () {
 if (this.c2 && this.c2.interval) return !1
 this.c2 = new $wuxCountDown({
 date: +(new Date) + 60000,
 onEnd() {
 this.setData({
  c2: '重新获取验证码',
 })
 },
 render(date) {
 const sec = this.leadingZeros(date.sec, 2) + ' 秒后重发 '
 date.sec !== 0 && this.setData({
  c2: sec,
 })
 },
 })
 }

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