vue实现正向计时器

本文主要是介绍vue实现正向计时器，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

html

<template><div class="container"><div class="all"><div class="topname">{{ jgname }} - 考试系统</div><!-- 图片切换方便--><div class="topimg"><img :src="topimg" alt="" class="zhou" /></div><div class="content"><div class="left"><div class="testimg"><img :src="examimg" alt="" /></div></div><div class="right"><div class="settime"><div class="timeimg"><img src="http://yikaojs.jymmy.cn/static/img/biao.png" alt="" /></div><!-- 正向计时器--><div class="number" ref="startTimer">00:00:00</div></div><div class="tip"><p style="font-weight: bold; font-size: 19px">考试注意事项:</p><p>1. 考试总时长为1小时，请合理安排做题速度</p><p>2.考试时要关闭手机，考试的时间在屏幕右上角显示</p><p>3.请准备好白纸用记录答案</p><p>4. 考试完成之后自行打分并上传分数</p></div><div class="btns"><!-- 开始考试 --><div class="start" @click="start()"><img :src="startimg" alt="" /></div><!-- 试卷提交--><div class="submit"><div class="unactive" style="display: block" @click="submit()"><img:src="submitimg"alt=""/></div></div></div></div></div></div><back :backData="backGo"></back></div>
</template>

js

<script>
import { number } from 'echarts';
import back from "./conmon/back";
export default {props: {time: {type: Number}},components: {back,},data () {return {backGo: 'exampage',jgname: '', //机构名称timer: "",  hour: 0,minutes: 0,  seconds: 0, //秒examimg:'',cr: '',//毫秒topimg: '',startimg: "http://yikaojs.jymmy.cn/static/img/start1.png",submitimg: "http://yikaojs.jymmy.cn/static/img/submit1.png",isClock: false}},created () {},//用户每次进入页面就触发activated () {//判断路径传的参数 执行变化 //用户周考1 月考2标识if (this.$route.query.tp === '1') {this.topimg = 'http://yikaojs.jymmy.cn/static/img/zou.png'} else if (this.$route.query.tp === '2') {this.topimg = 'http://yikaojs.jymmy.cn/static/img/yue.png'}this.jgname = this.$route.query.name  //机构名称显示路径传来的名称this.examimg = localStorage.getItem('exam_img')  //从本地取出图片},mounted () {},
//用户离开页面计时器结束 清零deactivated () {this.stop()this.resetTimer()},methods: {//点击计时开始start () {
//判断 如果isClock 是 true 不能再次触发计时 反之false 触发计时if (this.isClock) {return} else {
//isClock为false计时开始 变为true（防止用户重复点击触发计时器）this.timer = setInterval(this.startTimer, 1000);this.isClock = truethis.startimg = "http://yikaojs.jymmy.cn/static/img/start.png"  //开始按钮变灰this.submitimg = "http://yikaojs.jymmy.cn/static/img/submit.png" //提交按钮变亮}},
//计时器清零resetTimer () {this.resetDataValue()this.$refs.startTimer.innerHTML = (this.hour < 10 ? '0' + this.hour : this.hour) + ':' + (this.minutes < 10 ? '0' + this.minutes : this.minutes) + ':' + (this.seconds < 10 ? '0' + this.seconds : this.seconds);this.cr = this.seconds},resetDataValue(){this.timer="",this.hour=0,this.minutes=0,this.seconds=0,this.examimg='',this.cr='',this.topimg='',this.startimg="http://yikaojs.jymmy.cn/static/img/start1.png",this.isClock=false},
//开始计时的数字变化逻辑startTimer () {this.seconds += 1; //秒自增 >=60变成 0秒 分加 1分钟if (this.seconds >= 60) {this.seconds = 0;this.minutes = this.minutes + 1;}//分 >=60变成 0  时加 1小时if (this.minutes >= 60) {this.minutes = 0;this.hour = this.hour + 1;}this.$refs.startTimer.innerHTML = (this.hour < 10 ? '0' + this.hour : this.hour) + ':' + (this.minutes < 10 ? '0' + this.minutes : this.minutes) + ':' + (this.seconds < 10 ? '0' + this.seconds : this.seconds);this.cr = this.seconds},stop () {clearInterval(this.timer)this.isClock = false},//试卷提交submit () {if(this.hour <= 1){this.$alert('考试时长不能低于1个小时', {confirmButtonText: '确定'});}else{var num = this.$route.query.tp  //传用户周考月考标识和机构名称this.$router.push('/showKey' + '?tp=' + num + "&name=" + this.jgname)this.stop() //考试时间停止并把停止的时间传给答案页面展示学生考试时长localStorage.setItem('stoptime', this.$refs.startTimer.innerHTML)}},},}</script>

css

<style scoped>
.container {width: 1920px;height: 1080px;background: url("http://yikaojs.jymmy.cn/static/img/bei5.png");background-size: 100% 100%;position: relative;
}
.all {width: 88%;height: 1080px;margin: auto;
}
.topname {font-size: 45px;color: white;font-weight: bold;letter-spacing: 5px;text-shadow: rgb(70, 67, 67) 4px 3px 4px;position: relative;top: 8%;
}
.topimg {width: 235px;height: 93px;position: relative;top: 3%;left: 44%;
}
.topimg > img {width: 210px;height: 80px;
}
.content {width: 100%;height: 829px;margin: auto;position: relative;top: 7%;/* display: flex;justify-content: space-between; */
}
.left {width: 1362px;height: 829px;border-radius: 10px;background: rgba(220, 156, 236, 0.3);padding: 40px 0;/* background: chocolate; */
}
.testimg {width: 1276px;height: 756px;margin: auto;/* background: white; */border-radius: 10px;overflow: auto; //进度条
}.testimg > img {/* width: 1276px;height: 756px; */cursor: pointer;/* border-radius: 10px; */
}
.right {/* height: 100px;width: 100px; */width: 275px;height: 829px;border-radius: 10px;position: absolute;left: 83.8%;/* right: 5%; *//* background: blue; */background: rgba(160, 133, 224, 0.6);
}
.settime {width: 275px;height: 220px;background: rgba(230, 184, 241, 0.2);padding-top: 5px;
}
.timeimg {width: 121px;height: 120px;margin: auto;
}
.number {font-size: 38px;color: white;text-align: center;
}
.tip {width: 275px;height: 410px;margin: auto;padding: 22px 10px 0 10px;color: white;font-size: 18px;text-align: left;/* background: red; */
}
.tip > p {margin-bottom: 10px;
}
.btns {width: 216px;height: 170px;margin: auto;
}
.start,
.submit,
.fenxi {width: 216px;height: 64px;margin: 14px 0;/* background: yellow; */
}
</style>

上一级页面传来的周考月考标识和机构名称

  weekClick (item) {localStorage.setItem('exam_img',item.thumbnail)localStorage.setItem('analysis_img',item.thumbnail)localStorage.setItem('exams_id',item.id)localStorage.setItem('zhouyue',1)this.$router.push('/testContent' + '?tp=1&name=' + this.mechanism + "&id=" + Math.random().toString(36).substr(3))},monthClick (item) {localStorage.setItem('exam_img',item.thumbnail)localStorage.setItem('analysis_img',item.thumbnail)localStorage.setItem('exams_id',item.id)localStorage.setItem('zhouyue',2)this.$router.push('/testContent' + '?tp=2&name=' + this.mechanism + "&id=" + Math.random().toString(36).substr(3))},