vue.js 图片上传并预览及图片更换功能的实现代码
时间：2020-10-17 11:00:25 | 栏目：vue | 点击：次
这里讲解是图片上传和图片预览。主要是围绕我们常用功能的列子做讲解 ,并且没有格外引入其他js 所以你复制过去做简单修改便可以看到效果
效果图：
样式以及效果图一并展示
1.HTML
<div class="rz-picter">
<img :src="avatar" class="img-avatar">
<input type="file" name="avatar" id="uppic" accept="image/gif,image/jpeg,image/jpg,image/png" @change="changeImage($event)" ref="avatarInput" class="uppic">
</div>
2.js
data() {
return {
avatar: require('../assets/jia.jpg'),
}
},
图片一定要以require 的方式引入 这里的图片仅用来美化 并不是上传的图片
3.js 写方法
changeImage(e) {
var file = e.target.files[0]
var reader = new FileReader()
var that = this
reader.readAsDataURL(file)
reader.onload = function(e) {
that.avatar = this.result
}
},
就这么几段代码一个上传功能就写好了
4.切记我这里用了css来将input type = file 的样式重新优化了，并且将图片做了定位 所以点击中间图片就可以触发上传
你需要你的需求去定义你的样式
5.运用原生javascript我做了一个判断图片是否上传的的判断
if(document.getElementById('uppic').value.length == '') {
Toast('请上传图片');
return
}
6.附上css代码
.uppic {
height: 3rem;
width: 6rem;
margin: 0 auto;
opacity: 0;
z-index: 99999;
}
.img-avatar {
position: absolute;
}
附上写此功能所有代码
<template>
<div class="renzheng">
<div class="rz-notice" v-bind:style="{ display: isno}">
<p>名片用来鉴别是相关人员，温馨提示：<img src="../assets/static/img-icon/lan_cha.png" @click="hiddenwords"></p>
</div>
<van-tabs v-model="active" swipeable>
<van-tab v-for="(item,index) in navArr" :title="item.name" class="v-tab">
<div v-if="index==0">
<div class="color-black" style="text-align: center;margin-top: 0.4rem;">请上传本人名片照片</div>
<div class="rz-picter">
<img :src="avatar" class="img-avatar">
<input type="file" name="avatar" id="uppic" accept="image/gif,image/jpeg,image/jpg,image/png" @change="changeImage($event)" ref="avatarInput" class="uppic">
</div>
<div class="cuxian"></div>
<div class="my-content-list">
<div class="color-black"><span style="margin-right: 0.6rem;">真实姓名:</span><input v-model="yoursname" placeholder="请输入您的真实姓名" /></div>
</div>
<div class="my-content-list">
<div class="color-black"><span style="margin-right: 0.6rem;">手机号码:</span><input type="number" max="11" v-model="yoursphone" placeholder="请输入您的手机号码" /></div>
</div>
<div class="yzbtn" @click="submitBtn">
立即认证
</div>
</div>
<div v-if="index==1">
<div class="color-black" style="text-align: center;margin-top: 0.4rem;">请上传本人身份证照片</div>
<div class="rz-picter">
<img src="../assets/jia.jpg" />
<p>上传人像页</p>
</div>
<div class="rz-picter">
<img src="../assets/jia.jpg" />
<p>上传国辉页</p>
</div>
<div class="cuxian"></div>
<div class="my-content-list">
<div class="color-black"><span style="margin-right: 0.6rem;">真实姓名:</span><input placeholder="请输入您的真实姓名" /></div>
</div>
<div class="my-content-list">
<div class="color-black"><span style="margin-right: 0.6rem;">手机号码:</span><input type="number" placeholder="请输入您的手机号码" /></div>
</div>
<div class="yzbtn">
立即认证
</div>
</div>
</van-tab>
</van-tabs>
</div>
</template>
<script>
import { Tab, Tabs } from 'vant';
import { Toast } from 'vant'
export default {
name: 'renzheng',
data() {
return {
yoursname: '',
yoursphone: '',
avatar: require('../assets/jia.jpg'),
isno: 'block',
active: 0,
navArr: [{
name: "身份认证"
},
{
name: "实名认证"
}
],
}
},
methods: {
hiddenwords() {
this.isno = 'none'
},
submitBtn() {
if(this.yoursname == '') {
Toast("请填写你的真实姓名");
return;
}
if(this.yoursphone == '' || this.yoursphone == null) {
Toast("请填写你的手机号码");
return;
}
if(document.getElementById('uppic').value.length == '') {
Toast('请上传图片');
return;
}
},
changeImage(e) {
var file = e.target.files[0]
var reader = new FileReader()
var that = this
reader.readAsDataURL(file)
reader.onload = function(e) {
that.avatar = this.result
}
},
},
mounted: function() {
}
}
</script>
<style>
.rz-notice {
padding: 0.2rem 0.3rem;
display: flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
background: #F0F5FB;
color: #28D9EF;
}
.rz-notice img {
height: 0.22rem;
width: 0.22rem;
}
.rz-picter {
height: 3rem;
width: 6rem;
margin: 0.3rem auto;
border: 0.01rem solid #ededed;
display: flex;
flex-direction: column;
align-items: center;
justify-content: center;
}
.uppic {
height: 3rem;
width: 6rem;
margin: 0 auto;
opacity: 0;
z-index: 99999;
}
.img-avatar {
position: absolute;
}
/*立即验证*/
.yzbtn {
width: 90%;
height: 0.8rem;
background: #FF6600;
border-radius: 0.06rem;
margin: 30px auto;
text-align: center;
line-height: 0.8rem;
color: #FFFFFF
}
/*修改原有tab样式*/
.van-tab {
color: #A3A3A3!important;
}
.van-tab--active {
color: #000!important;
}
.van-tabs__line {
background-color: #FF6600!important;
width: 0.7rem!important;
text-align: center!important;
align-items: center;
margin-left: 1.5rem;
}
.van-toast {
background-color: #FF6600;
color: #FFFFFF
}
.my-content-list {
padding: 0.3rem;
display: flex;
flex-direction: row;
justify-content: space-between;
border-bottom: 0.01rem solid #EDEDED;
}
</style>
总结