这篇“如何用Vue.js实现动态添加、删除选题功能”文章的知识点大部分人都不太理解，所以小编给大家总结了以下内容，内容详细，步骤清晰，具有一定的借鉴价值，希望大家阅读完这篇文章能有所收获，下面我们一起来看看这篇“如何用Vue.js实现动态添加、删除选题功能”文章吧。
效果：
图中第二个选题是小颖点击了"新增选题"按钮,然后出来的,当你点击了"删除选项"或"删除选题"按钮,就会删除相应的选项和选题.
html代码
<template>
<div class="main-container">
<div class="form-horizontal">
<template v-for='(subjectIndex,subject) in question'>
<div class="form-group">
<label class="col-sm-1 control-label">选题:</label>
<label class="col-sm-2 control-label red remove-pad" v-if='$index>0' @click='deleteSubjectFun(subjectIndex)'>删除选题</label>
</div>
<div class="form-group">
<label class="col-sm-1 control-label">标题:</label>
<div class="col-sm-2">
<input type="text" class="form-control" placeholder="未填写" v-model='subject.title'>
</div>
</div>
<div class="form-group">
<label class="col-sm-1 control-label">正确答案:</label>
<div class="col-sm-1">
<input type="text" class="form-control answer" placeholder="未填写" readonly="true" v-model='subject.answer'>
</div>
<span class="prompting-message">请在以下选项中,勾选出正确答案</span>
</div>
<div class="form-group">
<label class="col-sm-1 control-label">分值:</label>
<div class="col-sm-1">
<input type="number" min="1" max="100" class="form-control" v-model='subject.score' @keyup='scoreFun(subjectIndex)'>
</div>
</div>
<div class="form-group">
<label class="col-sm-1 control-label">选项:</label>
</div>
<div class="form-group">
<div class="col-sm-3 mg1">
<ul class="upper-latin">
<template v-for='(opdtIndex,opdt) in subject.optionsData'>
<li>
<input type="checkbox" class="checkbox-answer" v-model='subject.answer' value='{{opdt.id}}'>
<div class="options-div">
<input type="text" class="form-control options-input" placeholder="未填写" v-model='opdt.options'>
<label class="control-label blue remove-pad" v-if='opdtIndex==subject.optionsData.length-1' @click='addNewOptionsFun(subjectIndex,opdtIndex)'>新增选项</label>
<label class="control-label red remove-pad" v-if='opdtIndex>0' @click='deleteOptionsFun(subjectIndex,opdtIndex)'>删除选项</label>
</div>
</li>
</template>
</ul>
</div>
</div>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-4">
<button class="blue boder" @click='addNewSubjectFun(subjectIndex)'>新增选题</button>
</div>
</div>
<div class='split-line'></div>
</template>
<div class="form-group">
<div class="col-sm-offset-1 col-sm-4">
<button class="btn btn-primary" @click='saveQuestionFun'>提交</button>
</div>
</div>
</div>
</div>
</template>js代码
<script>
export default {
components: {
},
props: {},
methods: {
// 新增选题
addNewSubjectFun: function(index) {
var subjectDataMes = {};
subjectDataMes.id = index+2;
subjectDataMes.title = '';
subjectDataMes.answer =[];
subjectDataMes.score = 10;
subjectDataMes.optionsData = [{
id: 'A',
options: ''
}];
this.question.push(subjectDataMes);
},
// 判断每个题目的分值不能小于零且不能大于一百
scoreFun:function(index){
if(this.question[index].score<0){
this.question[index].score=10;
this.$root.tipStr = '选题"'+this.question[index].title+'"的分值不能小于零';
}else if(this.question[index].score>100){
this.question[index].score=10;
this.$root.tipStr = '选题"'+this.question[index].title+'"的分值不能大于一百';
}
},
// 删除选题
deleteSubjectFun: function(index) {
this.question.splice(index, 1);
},
// 新增选项
addNewOptionsFun: function(subjectIndex, opdtIndex) {
var optionsDataMes = {};
optionsDataMes.id =String.fromCharCode(64 + (opdtIndex+2)); //将id从数字转换成大写字母.
optionsDataMes.options = '';
var subjectDataMes = this.question[subjectIndex].optionsData;
subjectDataMes.push(optionsDataMes);
},
// 删除选项
deleteOptionsFun: function(subjectIndex, opdtIndex) {
var subjectDataMes = this.question[subjectIndex].optionsData;
subjectDataMes.splice(opdtIndex, 1);
},
saveQuestionFun:function(){
this.question;debugger;
}
},
ready: function() {
},
data() {
return {
question: [{
id: 1,
title: '',
answer: [],
score:10,
optionsData: [{
id: 'A',
options: ''
}],
}],
}
}
}
</script>css代码
<style scoped>
.mg1 {
padding: 8px 0 0 113px;
}
.upper-latin {
list-style-type: upper-latin;
}
input.form-control.options-input {
display: inline-block; /*width: 499.16px;*/
width: 100%;
}
.boder {
border: 1px solid;
background-color: #fff;
border-radius: 4px;
line-height: 34px;
padding: 0 15px;
}
.blue {
color: #2689cd;
text-align: center;
}
label.red {
color: #c9302c;
}
label.remove-pad {
/*padding: 10px 20px 10px 15px;*/
line-height: 34px;
text-align: left;
}
.split-line {
height: 10px;
border-top: 2px dashed #E7E8EC;
width: 900px;
}
.prompting-message {
line-height: 34px;
}
.options-div {
margin-left: 26px;
margin-top: -25px;
padding-bottom: 25px;
}
</style>