Vue实现验证码功能

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
}

[....<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
  }
 },

<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 () {
  this.verifycode = new gverify('v_container')
}

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'
    })
   }

<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>