vue.js 图片上传并预览及图片更换功能的实现代码

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

以上所述是小编给大家介绍的vue.js" title="vue.js">vue.js 图片上传并预览及图片更换功能的实现代码,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对网站的支持!

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