1.创建code.js文件夹下面是js代码
function GVerify(options) {console.log(); // 创建一个图形验证码对象，接收options对象为参数this.con = document.getElementById(options)this.options = {// 默认options参数值id: '', // 容器IdcanvasId: 'verifyCanvas', // canvas的IDwidth: this.con.offsetWidth, // 默认canvas宽度height: this.con.offsetHeight, // 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 canvas = document.createElement('canvas')canvas.id = this.options.canvasIdlet {width, height } = this.optionscanvas.width = widthcanvas.height = heightcanvas.style.cursor = 'pointer'canvas.innerHTML = '您的浏览器版本不支持canvas'this.con.appendChild(canvas)var parent = thiscanvas.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}this.options.code = ''for (var i = 1; i <= 4; i++) {var txt = txtArr[randomNum(0, txtArr.length)]this.options.code += txtctx.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 * ivar y = this.options.height / 2var 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.code.js在组件中引入
3.在data中定义如下两个属性
value:"",verifyCode: "",
4.在mounted中执行方法
mounted(){this.verifyCode = new GVerify("auth_code");},
5.在template中定义div需要给div设置宽高
<div id="auth_code"></div>
6.在登录请求前进行判断成功向下执行,失败return并同时执行this.verifyCode.refresh()方法切换验证码，同时按照逻辑 在登录失败账号或密码错误时也需要执行this.verifyCode.refresh()切换验证码
if(this.verifyCode.validate(this.value)){}else{this.$message({message: "验证码错误",type: 'warning'});this.verifyCode.refresh();return}
7.效果图
