完整代码如下：
<!doctype html>
<html lang="zh">
<head>
<title>在线测试</title>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<!-- 内网Vue.js -->
<script src="D:\WebCode\Vue.js"></script>
<!-- Bootstrap CSS -->
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
</head>
<body>
<!-- view -->
<div id="app">
<!-- 导航栏 -->
<nav class="navbar navbar-expand-lg navbar-dark bg-success mb-5">
<a class="navbar-brand" href="#">{{title}}</a>
<button class="navbar-toggler d-lg-none" type="button" data-toggle="collapse"
data-target="#collapsibleNavId" aria-controls="collapsibleNavId" aria-expanded="false"
aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="collapsibleNavId">
<ul class="navbar-nav mr-auto mt-2 mt-lg-0">
<!-- <li class="nav-item active">
<a class="nav-link" href="#">Home</span></a>
</li> -->
<!-- 菜单 -->
<li v-for="(menu, index) in menus" :key="index" class="nav-item">
<a class="nav-link" :class="{active:index==0}" href="#">{{menu}}</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="dropdownId" data-toggle="dropdown"
aria-haspopup="true" aria-expanded="false">关于</a>
<div class="dropdown-menu" aria-labelledby="dropdownId">
<a v-for="(about, index) in abouts" :key="index" class="dropdown-item"
href="#">{{about}}</a>
</div>
</li>
</ul>
<form class="form-inline my-2 my-lg-0">
<input class="form-control mr-sm-2" type="text" placeholder="搜索题目.用户">
<button class="btn btn-outline-danger my-2 my-sm-0" type="submit">搜索</button>
</form>
</div>
</nav>
<!-- 答题区域 -->
<div v-if="!isFinish" class="container ">
<!-- 进度条 -->
<div class="progress mb-3">
<div class="progress-bar progress-bar-striped progress-bar-animated bg-primary" role="progressbar"
:style="progressStyle" aria-valuenow="25" aria-valuemin="0" aria-valuemax="100">{{progressBar}}
</div>
</div>
<div class="jumbotron">
<h1 class="display-4"><span class="badge badge-dark mr-3">{{question.id}}</span>{{question.title}}</h1>
<hr class="my-2">
<!-- 选项 -->
<div v-for="(item, i) in question.items" :key="i" class="form-check my-3">
<label class="form-check-label">
<input @change="setAnswer(question.id)" v-model="answer" type="radio" class="form-check-input"
name="item" id="" value="checkedValue" :value="itemIndexs[i]">
<span class="badge badge-pill badge-danger mr-2">{{itemIndexs[i]}}</span>
{{item}}
</label>
</div>
<!-- 按钮 -->
<!-- h行 -->
<div class="row">
<div class="col-lg-6 col-sm-12">
<button v-if="progress==0" disabled type="button" class="btn btn-danger btn-block disabled">上一题
</button>
<button v-else @click="prev()" type="button" class="btn btn-danger btn-block">上一题</button>
</div>
<div class="col-lg-6 col-sm-12">
<button v-if="isLast"
@click="submit()"
type="button" class="btn btn-primary btn-block mt-sm-3 mt-lg-0 ">提交</button>
<button v-else @click="next()" type="button"
class="btn btn-success btn-block mt-sm-3 mt-lg-0">下一题</button>
</div>
</div>
</div>
<!-- 题目的按钮 -->
<span v-for="(item, index) in questionList" :key="index">
<button @click="skip(index)" v-if="answers.has(index+1)" type="button" class="btn btn-primary">{{index+1}}</button>
<button @click="skip(index)" v-else type="button" class="btn btn-danger">{{index+1}}</button>
</span>
</div>
<!-- 显示答案 -->
<div v-else class="container">
<div class="jumbotron">
<h1 class="display-3 text-center">答案与成绩</h1>
<hr class="my-2">
<table class="table table-bordered table-striped">
<thead class="thead-dark text-center">
<tr>
<th>序号</th>
<th>答案</th>
<th>正确答案</th>
<th>得分</th>
</tr>
</thead>
<tbody>
<tr v-for="([k,v], index) in answers" :key="index">
<td>{{k}}</td>
<td><span v-if="v===correct(k)" class="badge badge-pill badge-danger">{{v}}</span>
<span v-else class="badge badge-pill badge-primary">{{v}}</span>
</td>
<!-- 根据id获取正确答案 -->
<td><span class="badge badge-pill badge-danger">{{correct(k)}}</span></td>
<!-- 根据索引获取正确答案 -->
<!-- <td><span class="badge badge-pill badge-danger">{{questionList[index].answer}}</span></td> -->
<td>
{{v===correct(k)?20:0}}
</td>
</tr>
<!-- 总计 -->
<tr
class="text-center h3 ">
<td colspan="3">总成绩</td>
<td > {{score}}</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<!-- viewModel -->
<script>
let vm = new Vue({
el: '#app',
data: {
score:0,
title: '在线测试',
menus: ['首页', '单选题', '多选题', '模拟测试'],
abouts: ['联系我们', '加入我们', '其他信息'],
isFinish: false,
progress: 0,
size: 0,
answer: '',
answers: new Map(),
itemIndexs: ['A', 'B', 'C', 'D', 'E', 'F'],
questionList: [
{
id: 1,
title: '最好的编程语言?',
items: ['PHP', 'C', 'JS', 'Java', 'GO'],
answer: 'A'
},
{
id: 2,
title: '最高级的数据库？',
items: ['Redit', 'MySQL', 'postgreSQL', 'MongDB'],
answer: 'C'
},
{
id: 3,
title: '开源数据是？',
items: ['DB2', 'Oracle', 'SQL Server', 'MySQL'],
answer: 'A'
},
{
id: 4,
title: '市值最高的公司？',
items: ['微软', '亚马逊', '苹果', '中国建行'],
answer: 'C'
},
{
id: 5,
title: '最好的前端框架？',
items: ['Angular', 'Vue', 'React', 'Java'],
answer: 'B'
}
],
},
methods: {
submit:function(){
// 答题完毕，提交答案
this.isFinish=true;
for (const q of this.questionList) {
if(q.answer===this.answers.get(q.id)){
this.score+=20;
}
}
},
skip:function(i){
this.progress=i;
this.answer='';
},
setAnswer: function (id) {
//判断是否重复的一道题
if (!this.answers.has(id)) {
// 答题的数量
this.size++;
}
this.answers.set(id, this.answer);
// console.log(this.answers);
},
next: function () {
this.progress++;
if (this.answers.has(this.progress)) {
this.answer = this.answers.get(this.progress + 1);
} else {
this.answer = '';
}
},
prev: function () {
//获得上一题的答案并且复位
this.answer = this.answers.get(this.progress);
this.progress--;
}
},
computed: {
// 根据id去获取题目的正确答案
correct(){
return function (id) {
for(const i of this.questionList){
if(i.id==id){
return i.answer;
}
}
}
},
// isFinish:function(){
// return this.size===this.questionList.length;
// },
question: function () {
return this.questionList[this.progress];
},
isLast: function () {
return this.progress == this.questionList.length - 1;
},
// progressStyle: function () {
// return `width:${this.progressChange}%;`;
// },
progressBar: function () {
return Math.round(this.size / this.questionList.length * 100);
},
progressStyle: function () {
return `width:${this.progressBar}%;`;
}
},
mounted() {
},
})
</script>
<!-- Optional JavaScript -->
<!-- jQuery first, then Popper.js, then Bootstrap JS -->
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js"
integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1"
crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"
integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM"
crossorigin="anonymous"></script>
</body>
</html>
效果如下：
