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