Vue实现验证码功能

本文实例为大家分享了Vue实现验证码的具体代码，供大家参考，具体内容如下1.效果2.代码2.

本文实例为大家分享了Vue实现验证码的具体代码，供大家参考，具体内容如下

1.效果

2.代码

2.1 创建js组件

内容

（可直接粘贴过去，需要改宽度和高度，修改_init方法中的宽和高）

function GVerify (options) { // 创建一个图形验证码对象，接收options对象为参数
 this.options = { // 默认options参数值
 id: '', // 容器Id
 canvasId: 'verifyCanvas', // canvas的ID
 width: '80', // 默认canvas宽度
 height: '30', // 默认canvas高度
 type: 'number', // 图形验证码默认类型blend:数字字母混合类型、number:纯数字、letter:纯字母
 code: ''
 }

 if (Object.prototype.toString.call(options) === '[object Object]') { // 判断传入参数类型
 for (var i in options) { // 根据传入的参数，修改默认参数值
 this.options[i] = options[i]
 }
 } else {
 this.options.id = options
 }

 this.options.numArr = '0,1,2,3,4,5,6,7,8,9'.split(',')
 this.options.letterArr = getAllLetter()

 this._init()
 this.refresh()
}

GVerify.prototype = {
 /** 版本号**/
 version: '1.0.0',

 /** 初始化方法**/
 _init: function () {
 var con = document.getElementById(this.options.id)
 var canvas = document.createElement('canvas')
 // this.options.width = con.offsetWidth > 0 ? con.offsetWidth : '30'
 // this.options.height = con.offsetHeight > 0 ? con.offsetHeight : '30'
 this.options.width = '160'
 this.options.height = '50'
 canvas.id = this.options.canvasId
 canvas.width = this.options.width
 canvas.height = this.options.height
 canvas.style.cursor = 'pointer'
 canvas.innerHTML = '您的浏览器版本不支持canvas'
 con.appendChild(canvas)
 var parent = this
 canvas.onclick = function () {
 parent.refresh()
 }
 },

 /** 生成验证码**/
 refresh: function () {
 var canvas = document.getElementById(this.options.canvasId)
 if (canvas.getContext) {
 var ctx = canvas.getContext('2d')
 }
 ctx.textBaseline = 'middle'

 ctx.fillStyle = randomColor(180, 240)
 ctx.fillRect(0, 0, this.options.width, this.options.height)

 if (this.options.type === 'blend') { // 判断验证码类型
 var txtArr = this.options.numArr.concat(this.options.letterArr)
 } else if (this.options.type === 'number') {
 var txtArr = this.options.numArr
 } else {
 var txtArr = this.options.letterArr
 }

 for (var i = 1; i <= 4; i++) {
 var txt = txtArr[randomNum(0, txtArr.length)]
 this.options.code += txt
 ctx.font = randomNum(this.options.height / 2, this.options.height) + 'px SimHei' // 随机生成字体大小
 ctx.fillStyle = randomColor(50, 160) // 随机生成字体颜色
 ctx.shadowOffsetX = randomNum(-3, 3)
 ctx.shadowOffsetY = randomNum(-3, 3)
 ctx.shadowBlur = randomNum(-3, 3)
 ctx.shadowColor = 'rgba(0, 0, 0, 0.3)'
 var x = this.options.width / 5 * i
 var y = this.options.height / 2
 var deg = randomNum(-30, 30)
 /** 设置旋转角度和坐标原点**/
 ctx.translate(x, y)
 ctx.rotate(deg * Math.PI / 180)
 ctx.fillText(txt, 0, 0)
 /** 恢复旋转角度和坐标原点**/
 ctx.rotate(-deg * Math.PI / 180)
 ctx.translate(-x, -y)
 }
 /** 绘制干扰线**/
 for (var i = 0; i < 4; i++) {
 ctx.strokeStyle = randomColor(40, 180)
 ctx.beginPath()
 ctx.moveTo(randomNum(0, this.options.width), randomNum(0, this.options.height))
 ctx.lineTo(randomNum(0, this.options.width), randomNum(0, this.options.height))
 ctx.stroke()
 }
 /** 绘制干扰点**/
 for (var i = 0; i < this.options.width / 4; i++) {
 ctx.fillStyle = randomColor(0, 255)
 ctx.beginPath()
 ctx.arc(randomNum(0, this.options.width), randomNum(0, this.options.height), 1, 0, 2 * Math.PI)
 ctx.fill()
 }
 },

 /** 验证验证码**/
 validate: function (code) {
 var code = code.toLowerCase()
 var v_code = this.options.code.toLowerCase()
 if (code == v_code) {
 return true
 } else {
 return false
 }
 }
}
/** 生成字母数组**/
function getAllLetter () {
 var letterStr = 'a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z'
 return letterStr.split(',')
}
/** 生成一个随机数**/
function randomNum (min, max) {
 return Math.floor(Math.random() * (max - min) + min)
}
/** 生成一个随机色**/
function randomColor (min, max) {
 var r = randomNum(min, max)
 var g = randomNum(min, max)
 var b = randomNum(min, max)
 return 'rgb(' + r + ',' + g + ',' + b + ')'
}

export {
 GVerify
}

2.2 登录页面

2.2.1 引入组件

[....<script>]

import { GVerify } from '../../static/js/verifyCode';

[export default { ....]

2.2.2 定义验证对象

注意 verifyCode

data: function () {
 return {
 title: '若晨后台管理系统',
 ruleForm: {
 username: '',
 password: '',
 verifyCode: ''
 },
 rules: {
 username: [
 { required: true, message: '请输入用户名', trigger: 'blur' }
 ],
 password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
 verifyCode: [
 { required: true, message: '请输入验证码', trigger: 'blur' }
 ]
 },
 verifyCode: null
 }
 },

2.2.3 初始化节点

<el-form-item prop="verifyCode" class="verifyCodeItemCss">
 <el-input class="verify_css" placeholder="请输入4位验证码" v-model="ruleForm.verifyCode" @keyup.enter.native="submitForm('ruleForm')"></el-input>
 <!--关键 ↓-->
 <div id="v_container"></div>
</el-form-item>

mounted方法中初始化 'v_container' 为div的id

mounted () {
 this.verifyCode = new GVerify('v_container')
}

2.2.4 验证输入的是否正确

通过在data中定义的verifyCode对象的validate()方法，如果输入正确返回true 错误返回 false

var that = this

 // 获取验证码
 var verifyCode = this.ruleForm.verifyCode
 var verifyFlag = this.verifyCode.validate(verifyCode)
 if (!verifyFlag) {
 that.$notify.error({
 title: '系统提示',
 message: '验证码输入错误'
 })
 return;
 } else {
 that.$notify({
 title: '系统提示',
 message: '验证码输入正确',
 type: 'success'
 })
 }

3.全部页面代码

<template>
 <div class="login-wrap">
 <div class="video-bg">
 <video muted="" data-autoplay="" loop="" autoplay="" src="https://gss3.baidu.com/6LZ0ej3k1Qd3ote6lo7D0j9wehsv/tieba-movideo/65886292_9687ec67dfc37bfbf847d82b6b52a276_96e56b0f4bfc.mp4" class="video-tvc" id="video-tvc" data-object-fit="">
 </video>
 </div>
 <div class="ms-title">{{title}}</div>
 <div class="ms-login">
 <el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="0px" class="demo-ruleForm">
 <el-form-item prop="username">
 <el-input v-model="ruleForm.username" placeholder="请输入账号"></el-input>
 </el-form-item>
 <el-form-item prop="password">
 <el-input type="password" placeholder="请输入密码" v-model="ruleForm.password" @keyup.enter.native="submitForm('ruleForm')"></el-input>
 </el-form-item>
 <el-form-item prop="verifyCode" class="verifyCodeItemCss">
 <el-input class="verify_css" placeholder="请输入4位验证码" v-model="ruleForm.verifyCode" @keyup.enter.native="submitForm('ruleForm')"></el-input>
 <div id="v_container"></div>
 </el-form-item>
 <div class="login-btn">
 <el-button class="loginBtn" type="primary" @click="submitForm('ruleForm')">登录</el-button>
 </div>
 <!--
 <p style="font-size:12px;line-height:30px;color:#999;">Tips : 用户名和密码随便填。</p>
 -->
 </el-form>
 </div>
 </div>
</template>

<script>
import { GVerify } from '../../static/js/verifyCode';
export default {
 data: function () {
 return {
 title: '若晨后台管理系统',
 ruleForm: {
 username: '',
 password: '',
 verifyCode: ''
 },
 rules: {
 username: [
 { required: true, message: '请输入用户名', trigger: 'blur' }
 ],
 password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
 verifyCode: [
 { required: true, message: '请输入验证码', trigger: 'blur' }
 ]
 },
 verifyCode: null
 }
 },
 mounted () {
 // 随机播放帧数
 this.videoCut()

 this.verifyCode = new GVerify('v_container')
 },
 methods: {
 submitForm (formName) {
 var that = this

 // 获取验证码
 var verifyCode = this.ruleForm.verifyCode
 var verifyFlag = this.verifyCode.validate(verifyCode)
 if (!verifyFlag) {
 that.$notify.error({
 title: '系统提示',
 message: '验证码输入错误'
 })
 return;
 } else {
 that.$notify({
 title: '系统提示',
 message: '验证码输入正确',
 type: 'success'
 })
 }

 this.$refs[formName].validate(valid => {
 if (valid) {
 // 判断是否登录成功

 let param = {
 userName: that.ruleForm.username,
 passWord: that.ruleForm.password
 }

 // this.axios.post(this.$service.user.USER_LOGIN_API.url,param).then(res=>{
 // console.log("请求成功",res)
 // if(res.data.data != undefined){
 // that.$notify({
 // title: '系统提示',
 // message: '登录成功',
 // type:"success"
 // });
 // // 存local
 // localStorage.setItem('ms_username',res.data.data.userNickName);
 // localStorage.setItem('token',res.data.data.id);
 // self.$router.push('/index');
 // }else{
 // that.$notify.error({
 // title: '系统提示',
 // message: '用户账户密码输出错误'
 // });
 // }

 localStorage.setItem('ms_username', 'admin')
 localStorage.setItem('token', 'admin')
 that.$router.push('/index')
 } else {
 console.log('error submit!!')
 return false
 }
 })
 },

 videoCut () {
 $('video').on('loadedmetadata', function (event) {
 var duration = Math.ceil(this.duration)
 this.currentTime = Math.round(Math.random() * duration)
 })
 }
 }
}
</script>


<style scoped>
.verify_css {
 width: 45%;
}

.login-wrap {
 position: relative;
 width: 100%;
 height: 100%;
}
.ms-title {
 position: absolute;
 top: 50%;
 width: 100%;
 margin-top: -230px;
 text-align: center;
 font-size: 30px;
 color: #fff;
}

.ms-login {
 position: absolute;
 left: 50%;
 top: 50%;
 width: 300px;
 height: 13rem;
 margin: -150px 0 0 -190px;
 padding: 40px;
 border-radius: 6%;
 background: #fff;
 box-shadow: -2px -2px 17px 1px #1e9fff;
}
.login-btn {
 text-align: center;
}
.login-btn button {
 width: 100%;
 height: 36px;
}
.video-bg {
 min-width: 100%;
 min-height: 100%;
 width: 100%;
 height: 100%;
 opacity: 0.9;
}
video {
 width: 100%;
 height: 100%;
 object-fit: cover;
 /* opacity: 0.6; */
}

.loginBtn:hover {
 box-shadow: 0px 1px 4px rgba(0, 0, 0, 0.3),
 0px 0px 20px rgba(0, 0, 0, 0.1) inset;
}

#v_container {
 width: auto;
 height: auto;
 display: inline-flex;
 position: relative;
 top: 1rem;
 margin-top: -2rem;
}
</style>

git 参考源码

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。