vue登录时人机验证-随机验证码(identify)
如果需要使用滑块验证:vue登录时人机验证-滑块验证
随机验证码
效果图:
实现步骤:
1、封装Identity组件
<template> <div class="s-canvas"> <canvas id="s-canvas" :width="contentWidth" :height="contentHeight" style="cursor: pointer;"></canvas> </div> </template> <script> export default { name: 'SIdentify', props: { identifyCode: { //默认注册码 type: String, default: '1234' }, fontSizeMin: { // 字体最小值 type: Number, default: 25 }, fontSizeMax: { // 字体最大值 type: Number, default: 35 }, backgroundColorMin: { // 验证码图片背景色最小值 type: Number, default: 200 }, backgroundColorMax: { // 验证码图片背景色最大值 type: Number, default: 220 }, dotColorMin: { // 背景干扰点最小值 type: Number, default: 60 }, dotColorMax: { // 背景干扰点最大值 type: Number, default: 120 }, contentWidth: { //容器宽度 type: Number, default: 116 }, contentHeight: { //容器高度 type: Number, default: 38 } }, methods: { // 生成一个随机数 randomNum(min, max) { return Math.floor(Math.random() * (max - min) + min) }, // 生成一个随机的颜色 randomColor(min, max) { let r = this.randomNum(min, max) let g = this.randomNum(min, max) let b = this.randomNum(min, max) return 'rgb(' + r + ',' + g + ',' + b + ')' }, drawPic() { let canvas = document.getElementById('s-canvas') let ctx = canvas.getContext('2d') ctx.textBaseline = 'bottom' // 绘制背景 ctx.fillStyle = this.randomColor(this.backgroundColorMin, this.backgroundColorMax) ctx.fillRect(0, 0, this.contentWidth, this.contentHeight) // 绘制文字 for (let i = 0; i < this.identifyCode.length; i++) { this.drawText(ctx, this.identifyCode[i], i) } this.drawLine(ctx) this.drawDot(ctx) }, drawText(ctx, txt, i) { ctx.fillStyle = this.randomColor(50, 160) //随机生成字体颜色 ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' //随机生成字体大小 let x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1)) let y = this.randomNum(this.fontSizeMax, this.contentHeight - 5) var deg = this.randomNum(-30, 30) // 修改坐标原点和旋转角度 ctx.translate(x, y) ctx.rotate((deg * Math.PI) / 180) ctx.fillText(txt, 0, 0) // 恢复坐标原点和旋转角度 ctx.rotate((-deg * Math.PI) / 180) ctx.translate(-x, -y) }, drawLine(ctx) { // 绘制干扰线 for (let i = 0; i < 4; i++) { ctx.strokeStyle = this.randomColor(100, 200) ctx.beginPath() ctx.moveTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight)) ctx.lineTo(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight)) ctx.stroke() } }, drawDot(ctx) { // 绘制干扰点 for (let i = 0; i < 30; i++) { ctx.fillStyle = this.randomColor(0, 255) ctx.beginPath() ctx.arc(this.randomNum(0, this.contentWidth), this.randomNum(0, this.contentHeight), 1, 0, 2 * Math.PI) ctx.fill() } } }, watch: { identifyCode() { this.drawPic() } }, mounted() { this.drawPic() } } </script>
2、Login.vue中引入并注册
import Identify from './components/Identify'
components: { Identify }
3、页面中添加Identity组件
<div @click="handleRefreshCode()"> <Identify :identifyCode="identifyCode"></Identify> </div>
4、data中添加两个参数
identifyCode: '1234', // 验证码初始值 identifyCodes: '1234567890' // 验证码的随机取值范围
5、methods中添加handleRefreshCode()方法
// 刷新验证码 handleRefreshCode() { this.identifyCode = '' this.makeCode(this.identifyCodes, 4) }, // 生成一个随机整数 randomNum(0, 10) 0 到 10 的随机整数, 包含 0 和 10 randomNum(min, max) { max = max + 1 return Math.floor(Math.random() * (max - min) + min) }, // 随机生成验证码字符串 makeCode(data, len) { for (let i = 0; i < len; i++) { this.identifyCode += data[this.randomNum(0, data.length - 1)] } },
6、当前默认初始验证码为“1234”,如果初始状态需要随机验证码在页面挂载后触发handleRefreshCode()函数即可
mounted(){ this.handleRefreshCode() },