How to implement verification code in vue

Vue's method of implementing verification code: 1. Create a js component; 2. Introduce the component; 3. Define the verification object; 4. Initialize the node; 5. Verify whether the input is correct through the validate() method.

The operating environment of this article: windows7 system, vue2.9.6 version, DELL G3 computer.

How does vue implement verification code

Vue implements verification code function

The specific content is as follows

1. Effect

2. Code

2.1 Create js component

Content

(You can paste it directly, you need to change the width and height, modify the width and height in the _init method)

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) + &#39;px SimHei&#39; // 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 = &#39;rgba(0, 0, 0, 0.3)&#39;
   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 = &#39;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&#39;
 return letterStr.split(&#39;,&#39;)
}
/** 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 &#39;rgb(&#39; + r + &#39;,&#39; + g + &#39;,&#39; + b + &#39;)&#39;
}
 
export {
 GVerify
}

2.2 Login page

2.2.1 Introduce components

[....<script>]
 
import { GVerify } from &#39;../../static/js/verifyCode&#39;;
 
[export default { ....]

2.2.2 Define the verification object

Note 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 Initialize the node

<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(&#39;ruleForm&#39;)"></el-input>
     <!--关键 ↓-->
     <div id="v_container"></div>
</el-form-item>

In the mounted method, initialize 'v_container' to the id of the div

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

2.2.4 Verify whether the input is correct

Through the verify() method of the verifyCode object defined in data, true is returned if the input is correct and false is returned if the error occurs

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 .All page codes

 
<script>
import { GVerify } from &#39;../../static/js/verifyCode&#39;;
export default {
 data: function () {
  return {
   title: &amp;#39;若晨后台管理系统&amp;#39;,
   ruleForm: {
    username: &amp;#39;&amp;#39;,
    password: &amp;#39;&amp;#39;,
    verifyCode: &amp;#39;&amp;#39;
   },
   rules: {
    username: [
     { required: true, message: &amp;#39;请输入用户名&amp;#39;, trigger: &amp;#39;blur&amp;#39; }
    ],
    password: [{ required: true, message: &amp;#39;请输入密码&amp;#39;, trigger: &amp;#39;blur&amp;#39; }],
    verifyCode: [
     { required: true, message: &amp;#39;请输入验证码&amp;#39;, trigger: &amp;#39;blur&amp;#39; }
    ]
   },
   verifyCode: null
  }
 },
 mounted () {
  // 随机播放帧数
  this.videoCut()
 
  this.verifyCode = new GVerify(&#39;v_container&#39;)
 },
 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.$notify.error({
     title: &amp;#39;系统提示&amp;#39;,
     message: &amp;#39;验证码输入错误&amp;#39;
    })
    return;
   } else {
    that.$notify({
     title: &amp;#39;系统提示&amp;#39;,
     message: &amp;#39;验证码输入正确&amp;#39;,
     type: &amp;#39;success&amp;#39;
    })
   }
 
   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: &#39;系统提示&#39;,
     //       message: &#39;登录成功&#39;,
     //       type:"success"
     //     });
     //           // 存local
     //     localStorage.setItem(&#39;ms_username&#39;,res.data.data.userNickName);
     //     localStorage.setItem(&#39;token&#39;,res.data.data.id);
     //     self.$router.push(&#39;/index&#39;);
     //   }else{
     //     that.$notify.error({
     //     title: &#39;系统提示&#39;,
     //     message: &#39;用户账户密码输出错误&#39;
     //     });
     //   }
 
     localStorage.setItem(&#39;ms_username&#39;, &#39;admin&#39;)
     localStorage.setItem(&#39;token&#39;, &#39;admin&#39;)
     that.$router.push(&#39;/index&#39;)
    } else {
     console.log(&#39;error submit!!&#39;)
     return false
    }
   })
  },
 
  videoCut () {
   $(&#39;video&#39;).on(&#39;loadedmetadata&#39;, function (event) {
    var duration = Math.ceil(this.duration)
    this.currentTime = Math.round(Math.random() * duration)
   })
  }
 }
}
</script>
 
 

Recommended learning: "The latest 5 vue.js video tutorial selections"

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