Vue回炉重造之搭建考试答卷系统
你好，我是Vam的金豆之路，可以叫我豆哥。2019年年度博客之星、技术领域博客专家。主要领域：前端开发。我的微信是 maomin9761，有什么疑问可以加我哦，自己创建了一个微信技术交流群，可以加我邀请你一起交流学习。最后自己也创建了一个微信公众号：前端历劫之路，欢迎关注。
欢迎阅读本博文，本博文主要讲述【Vue回炉重造之搭建考试答卷系统】，文字通俗易懂，如有不妥，还请多多指正。
本篇章主要讲述系统搭建逻辑，有疑问的可以加微信联系我。
考试系统
资源
- Vue.js
- Element UI
- 第三方数据接口
业务
- 答题过程中，防止用户中途退出或者其他不可抗力因素阻碍答题，在每次选择都要请求下接口（接口状态为未交卷，只是保存用户的答题进度）。
- 选择答题区与答题卡必须同步，另外右侧的进度条也是同步的。
- 剩余时间的计算方法（
begin.getTime() + duration * 1000 - serverTime.getTime()），
即开始考试时间+考试时间-服务器时间，首次进入开始考试时间为空。 - 考试时间到或者主动交卷都是置为已交卷。
源码
Exam.vue
<template>
<div class="exam">
<div class="main">
<div class="header-wrapper">
<div class="inner">
<el-row>
<el-col :span="18">
<div class="grid-content bg-purple ovf left">
<div class="logo">
<router-link to="/">
<img src="../../assets/images/logo.png" />
router-link>
div>
<div class="index">{{title}}div>
div>
el-col>
<el-col :span="6">
<div class="grid-content bg-purple right ovf">
<div class="esc" @click="esc">退出div>
<div class="name">{{name}}div>
div>
el-col>
el-row>
div>
div>
<div class="mian-body">
<div class="main-side">
<div class="title">
<div class="title_border">div>
<div class="title_content">答题卡div>
div>
<div class="card-content-list">
<div class="card-content">
<div class="card-content-title">单选题(共{{examinationData.length}}题，合计{{full_score}}分)div>
<div class="box-list">
<div
class="box normal-box question_cbox"
v-for="(item,index) in examinationData"
:key="index"
>
<div
class="checki"
:class="{'checked':radio[index]}"
v-show="!checkResult"
>{{index+1}}div>
<div
class="checki checked"
:class="{'check-error':radio[index]}"
v-show="checkResult"
>{{index+1}}div>
div>
div>
div>
div>
div>
<div class="main-center">
<div class="body-wrapper">
<div class="questions">
<div class="questions-title">单选题(共{{examinationData.length}}题，合计{{full_score}}分)div>
<div class="questions-content">
<div class="question-content" v-for="(item,i) in examinationData" :key="i">
<div v-if="item.type=='radiogroup'">
<div class="exam-question">
<span class="question-index ellipsis">{{i+1}}.span>
{{item.title}}
div>
<div v-if="!checking">
<div class="answers" v-for="(son,index) in item.choices" :key="index">
<el-radio-group v-model="radio[i]">
<el-radio
v-model="radio[i]"
:label="son.value"
:name="son.text"
@change="getIputValue(i)"
>{{son.text}}el-radio>
el-radio-group>
div>
div>
<div v-else>
<div class="answers" v-for="(son,index) in item.choices" :key="index">
<el-radio-group v-model="checkData[i].value">
<el-radio
v-model="radio[i]"
:label="son.value"
:name="son.text"
@change="getIputValue(i)"
>{{son.text}}el-radio>
el-radio-group>
div>
div>
div>
<div v-if="item.type=='imagepicker'">
<div class="exam-question">
<span class="question-index ellipsis">{{i+1}}.span>
{{item.title}}
div>
<div v-if="!checking">
<div class="answers" v-for="(son,index) in item.choices" :key="index">
<el-radio-group v-model="radio[i]">
<el-radio
v-model="radio[i]"
:label="son.value"
:name="son.value"
@change="getIputValue(i)"
>
<img :src="son.imageLink" alt />
el-radio>
el-radio-group>
div>
div>
<div v-else>
<div class="answers" v-for="(son,index) in item.choices" :key="index">
<el-radio-group v-model="checkData[i].value">
<el-radio
v-model="radio[i]"
:label="son.value"
:name="son.value"
@change="getIputValue(i)"
>
<img :src="son.imageLink" alt />
el-radio>
el-radio-group>
div>
div>
div>
div>
div>
div>
div>
div>
<div class="main-right">
<div class="nav">
<ul v-show="!checkResult">
<li class="menu-item">
<div class="item-label">剩余时间div>
<div class="item-data">
<Time
@show="handInHand"
:status="submitView"
:examtime="examtime"
v-if="examtime!=''"
>Time>
div>
li>
<li class="menu-item">
<div class="item-label">当前进度div>
<div class="item-press">
<span>{{radio.filter(v=>v).length}}span>
<span>{{examinationData.length}}span>
div>
<div class="percentage">
<el-progress :percentage="percentage" :color="customColor">el-progress>
div>
li>
ul>
div>
<div class="btn" v-show="!checkResult" @click="submit">提交div>
div>
div>
div>
div>
template>
<script>
import axios from "axios";
import { saveAnswers } from "../../request/api";
import { mapGetters } from "vuex";
import Time from "../../components/module/Time"; // 倒计时组件
export default {
name: "Exam",
data() {
return {
checkData: [],
checking: false,
name: "",
examtime: "",
title: "",
customColor: "#55b6da",
percentage: 0,
submitView: false,
full_score: "",
signView: false, // 正确与错误
passView: false, // 通过或者未通过
checkResult: false, // 左侧栏、右侧栏、答题结果栏
options: [
{
value: "0",
label: "全部"
},
{
value: "1",
label: "答对"
},
{
value: "2",
label: "答错"
}
],
checkVal: "0",
examinationData: "",
allRadio: [], //提交给后台的真题数据
radio: [], //单选真题答案,
checkLen: [],
obj: { value: "" },
answersData: []
};
},
computed: {
...mapGetters(["getInfo"])
},
methods: {
// 退出考试系统
esc() {
this.$router.push({
path: "/"
});
},
// 主动交卷
submit() {
this.$confirm("确定交卷吗?", "提示", {
distinguishCancelAndClose: true,
confirmButtonText: "交卷",
cancelButtonText: "不交卷",
type: "warning"
})
.then(() => {
if (this.checking === false) {
this.answersData.value = this.radio || "";
this.upAnswer(1, JSON.stringify(this.answersData)); //提交答案
} else {
this.upAnswer(1, JSON.stringify(this.checkData)); //提交答案
}
this.submitView = true; // 提示已提交
})
.catch(err => {
console.log(err);
});
},
// 自动交卷（时间到）
handInHand() {
// this.signView = true; // 正确与错误
// this.passView = true; // 通过或者未通过
// this.checkResult = true; // 左侧栏、右侧栏、答题结果栏
if (this.checking === false) {
this.answersData.value = this.radio || "";
this.upAnswer(1, JSON.stringify(this.answersData)); //提交答案
} else {
this.upAnswer(1, JSON.stringify(this.checkData)); //提交答案
}
},
// 提交答案接口
upAnswer(finish, answers) {
let postData = {
exam_id: Number(this.$route.params.id),
finish: finish,
answers: answers
};
saveAnswers(postData)
.then(res => {
if (res.code == 0) {
console.log("提交/保存答案成功")
} else if (res.code == 201) {
this.$message.success({
message: res.msg,
offset: 380,
duration: 1000
});
} else {
this.$message.warning({
message: res.msg,
offset: 380,
duration: 1000
});
}
})
.catch(err => {
console.log(err);
});
},
// 获取考试题
get() {
if (this.$route.params.id != "" && this.$route.params.id != undefined) {
axios
.get("/api/exams/" + this.$route.params.id)
.then(res => {
if (res.data.code == 0) {
let data = res.data.data.item.exercise;
this.title = res.data.data.item.name;
this.examtime = this.toHHmmss(
this.madeTime(
res.data.serverTime,
res.data.data.userExam.begin_at,
res.data.data.item.duration
)
);
this.examinationData = data.pages[0].elements;
this.examinationData.forEach((item, i) => {
this.answersData[i] = { value: "" };
});
if (res.data.data.userExam.answer != null) {
let fobj = JSON.parse(res.data.data.userExam.answer);
this.checkData = JSON.parse(res.data.data.userExam.answer);
fobj.forEach((item, i) => {
if (item.value != "") {
this.radio[i] = item;
}
});
this.checking = true;
let len =
(this.radio.filter(v => v).length /
this.examinationData.length) *
100;
this.percentage = len;
}
this.full_score = res.data.data.item.full_score;
}
})
.catch(err => {
console.log(err);
});
}
},
// 倒计时处理
madeTime(serverTime1, begin1, duration1) {
var serverTime = new Date(serverTime1); // 系统时间
var duration = duration1; //考试时间
if (begin1 != null) {
var begin = new Date(begin1); //开始时间
var residue = begin.getTime() + duration * 1000 - serverTime.getTime(); // 倒计时
} else {
// eslint-disable-next-line no-redeclare
var residue = duration * 1000 - serverTime.getTime(); // 倒计时
}
return residue;
},
// 时间戳时分秒
toHHmmss(data) {
let date = {};
let hours = parseInt((data % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
let minutes = parseInt((data % (1000 * 60 * 60)) / (1000 * 60));
let seconds = (data % (1000 * 60)) / 1000;
date.hours = hours;
date.minutes = minutes;
date.seconds = seconds;
return date;
},
// 选择操作
getIputValue(index) {
this.allRadio[index] = this.radio[index]; // 将数据存入提交给后台的数据中
let len =
(this.radio.filter(v => v).length / this.examinationData.length) * 100;
this.percentage = len;
if (this.checking === false) {
this.answersData[index].value = this.radio[index] || "";
this.upAnswer(0, JSON.stringify(this.answersData)); //提交答案
} else {
this.upAnswer(0, JSON.stringify(this.checkData)); //提交答案
}
}
},
beforeRouteEnter(to, from, next) {
next(() => {
// 改变html背景
document.querySelector("html").style.cssText = `
background: #ecf1f6;
`;
});
},
beforeRouteLeave(to, from, next) {
// 消除html背景
document.querySelector("html").style.cssText = `background: #fff;`;
// 中途退出提示
this.$confirm("确定中途退出吗, 是否继续?", "提示", {
confirmButtonText: "确定",
cancelButtonText: "取消",
type: "warning"
})
.then(() => {
next();
})
.catch();
},
components: {
Time
},
created() {
this.get();
},
mounted() {
this.name = this.getInfo.name;
}
};
script>
<style scoped lang="scss">
/deep/ .el-progress__text {
display: none;
}
/deep/ .el-select .el-input__inner:focus {
border-color: #55b6da;
}
/deep/ .el-select {
border: none;
}
/deep/ .el-select-dropdown__item.selected {
color: #55b6da !important;
font-weight: bold;
}
/deep/ .el-radio__input.is-checked + .el-radio__label {
color: #55b6da;
}
/deep/ .el-radio__input.is-checked .el-radio__inner {
border-color: #55b6da;
background: #55b6da;
}
/deep/ .el-radio__inner:hover {
border-color: #55b6da;
}
/deep/ .el-radio {
display: block;
margin: 20px 0;
}
.inner {
padding: 0px 90px;
}
.exam {
background: #ecf1f6;
height: 100%;
min-height: 100%;
}
.main {
.header-wrapper {
height: 80px;
width: 100%;
line-height: 80px;
background: #ffffff;
box-shadow: 0 2px 4px 0 rgba(153, 153, 153, 0.1);
position: fixed;
top: 0;
left: 0;
z-index: 1040;
.left {
display: flex;
align-items: center;
font-size: 18px;
.logo {
width: 150px;
margin-right: 120px;
img {
width: 100%;
}
}
}
.right {
div {
float: right;
font-size: 16px;
}
.esc {
width: 120px;
height: 38px;
line-height: 38px;
margin: 21px 0;
color: #fff;
background: #55b6da;
border-radius: 30px;
text-align: center;
cursor: pointer;
user-select: none;
&:hover {
filter: brightness(80%);
}
&:active {
filter: brightness(60%);
}
}
.name {
margin-right: 55px;
font-weight: bold;
}
}
}
.mian-body {
.main-side {
display: inline-block;
height: calc(100% - 140px);
position: fixed;
top: 120px;
width: 240px;
left: 90px;
background: #fff;
box-shadow: 0 1px 4px 0 rgba(58, 62, 81, 0.1);
.title {
position: relative;
text-align: left;
margin: 23px 0px 0px 12px;
.title_border {
display: inline-block;
width: 4px;
height: 26px;
background: #33394b;
border-radius: 15px;
position: absolute;
top: 0;
bottom: 0;
margin: auto;
}
.title_content {
margin-left: 14px;
font-size: 18px;
font-weight: 600;
color: #27274a;
}
}
.card-content-list {
height: calc(100% - 38px);
overflow: auto;
.card-content {
padding: 0 12px 0 12px;
position: relative;
.card-content-title {
font-size: 14px;
color: #27274a;
font-weight: 600;
padding-bottom: 12px;
padding-top: 20px;
}
.box-list {
padding-bottom: 0;
position: relative;
left: -5px;
font-size: 0;
margin-right: -15px;
.box {
height: auto;
line-height: unset;
position: relative;
margin-bottom: 15px;
font-size: 14px;
width: 35px;
margin-top: unset;
margin-right: unset;
display: inline-block;
.checki {
border: 1px solid #dcdfe6;
color: #dcdfe6;
width: 27px;
height: 27px;
text-align: center;
display: inline-block;
line-height: 27px;
background: #fff;
border-radius: 50%;
cursor: pointer;
}
.checked {
color: #fff;
background: #55b6da;
}
.check-error {
color: #fff;
background: #ec6941;
}
}
}
}
}
}
.main-center {
margin: 120px 230px 0px 360px;
height: 100vh;
.body-wrapper {
color: #27274a;
width: 100%;
background: #ffffff;
border: 1px solid #dedede;
border-radius: 4px;
.questions-title {
font-size: 18px;
line-height: 25px;
padding: 18px 20px;
background: #fafafa;
border-bottom: 1px solid #dedede;
}
.questions-content {
padding-left: 30px;
padding-right: 75px;
}
.question-content {
border-bottom: 1px solid #dedede;
padding: 30px 0;
position: relative;
&:last-child {
border: none;
}
.exam-question {
font-size: 16px;
line-height: 22px;
margin-bottom: 10px;
padding-left: 20px;
position: relative;
.question-index {
color: #55b6da;
position: absolute;
left: -25px;
top: 0;
display: inline-block;
width: 40px;
line-height: 22px;
text-align: right;
}
}
.analysis {
overflow: auto;
background: rgba(222, 222, 222, 0.2);
border-radius: 4px;
padding: 15px 20px;
line-height: 24px;
margin-top: 10px;
position: relative;
.question-icon-wrapper {
position: absolute;
right: 10px;
top: 14px;
.sign {
width: 48px;
height: 28px;
position: absolute;
color: #fff;
top: 10px;
right: 0;
font-size: 14px;
border-radius: 2px;
line-height: 28px;
text-align: center;
font-style: normal;
}
.icon-error {
background: #ec6941;
}
.icon-right {
background: #55b6da;
}
}
.analysis-row {
font-size: 14px;
margin-top: 10px;
min-height: 24px;
padding-left: 80px;
padding-right: 60px;
position: relative;
.analysis-title {
position: absolute;
width: 80px;
left: 0;
top: 0;
}
.question-analysis {
text-align: justify;
}
.error {
color: #f72a3a;
font-weight: bold;
}
}
}
}
}
}
.main-right {
right: 90px;
bottom: 20px;
position: fixed;
top: 120px;
width: 120px;
.nav {
color: #27274a;
line-height: 20px;
padding: 0 10px;
background: #ffffff;
box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.1);
border-radius: 4px;
margin-bottom: 10px;
text-align: center;
.menu-item {
padding: 14px 0;
border-bottom: 1px solid #dedede;
}
.menu-item:last-child {
border: none;
}
.pass {
color: #55b6da;
}
.item-result,
.unpass {
color: rgb(236, 105, 65);
}
.item-label {
margin-bottom: 6px;
}
.item-data {
font-size: 18px;
line-height: 22px;
color: #ff0000;
font-weight: 400;
}
.item-press {
line-height: 17px;
margin-bottom: 7px;
color: #27274a;
font-size: 14px;
& span:nth-child(1)::after {
content: "/";
margin: 0 5px;
}
}
}
.btn {
bottom: -10px;
position: absolute;
width: 100%;
margin-bottom: 10px;
cursor: pointer;
text-align: center;
height: 38px;
line-height: 38px;
border-radius: 20px;
color: #fff;
background: #33394b;
user-select: none;
&:hover {
filter: brightness(120%);
}
&:active {
filter: brightness(60%);
}
}
}
}
}
style>
Time.vue
<template>
<div class="time">
<p>{{timerHours}}:{{timerMinutes}}:{{timerSeconds}}p>
div>
template>
<script>
export default {
name: "Time",
props: ["status", "examtime"],
data() {
return {
hours: "",
seconds: "",
minutes: "",
timer: null
};
},
watch: {
status(v) {
if (v) {
clearInterval(this.timer);
this.$emit("show");
}
}
},
methods: {
// 倒计时
timing() {
this.timer = setInterval(() => {
if (this.seconds == 0&this.minutes>0) {
this.seconds = 59;
this.minutes--;
} else if (this.minutes == 0&&this.hours>0) {
this.minutes=59;
this.hours--;
} else if (this.minutes == 0 && this.seconds == 0 && this.hours == 0) {
this.seconds = 0;
clearInterval(this.timer);
this.$emit("show");
this.$message.warning({
message: "考试时间到，自动交卷！",
offset: 380,
duration: 1000
});
} else {
this.seconds--;
}
}, 1000);
}
},
created() {
this.minutes = this.examtime.minutes;
this.seconds = this.examtime.seconds;
this.hours = this.examtime.hours;
},
mounted() {
this.timing();
},
computed: {
timerSeconds() {
return this.seconds < 10 ? "0" + this.seconds : "" + this.seconds;
},
timerMinutes() {
return this.minutes < 10 ? "0" + this.minutes : "" + this.minutes;
},
timerHours() {
return this.hours < 10 ? "0" + this.hours : "" + this.hours;
}
},
destroyed() {
// 退出后清除计时器
if (this.timer) {
clearInterval(this.timer);
}
}
};
script>
<style scoped lang="scss">
style>
谢谢阅读，如果觉得有感触，麻烦帮忙点个赞，关个注吧！
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