今天小编给大家分享一下vue+Element怎么实现登录随机验证码的相关知识点,内容详细,逻辑清晰,相信大部分人都还太了解这方面的知识,所以分享这篇文章给大家参考一下,希望大家阅读完这篇文章后有所收获,下面我们一起来了解一下吧。
验证码验证只是前端,无需后台交互
首先,创建一个identify.vue页面,用于写各种:随机数字/字母,随机颜色,干扰点/线
identify.vue
<template> <div class="s-canvas"> <canvas id="s-canvas" :width="contentWidth" :height="contentHeight"> </canvas> </div> </template> <script> export default { name: 'SIdentify', props: { identifyCode: { type: String, default: '1234' }, fontSizeMin: { type: Number, default: 16 }, fontSizeMax: { type: Number, default: 40 }, backgroundColorMin: { type: Number, default: 180 }, backgroundColorMax: { type: Number, default: 240 }, colorMin: { type: Number, default: 50 }, colorMax: { type: Number, default: 160 }, lineColorMin: { type: Number, default: 40 }, lineColorMax: { type: Number, default: 180 }, dotColorMin: { type: Number, default: 0 }, dotColorMax: { type: Number, default: 255 }, contentWidth: { type: Number, default: 112 }, contentHeight: { 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) { var r = this.randomNum(min, max) var g = this.randomNum(min, max) var b = this.randomNum(min, max) return 'rgb(' + r + ',' + g + ',' + b + ')' }, drawPic() { var canvas = document.getElementById('s-canvas') var 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(this.colorMin, this.colorMax) ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) +'px SimHei'; var x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1)) var y = this.randomNum(this.fontSizeMax,this.contentHeight - 5) var deg = this.randomNum(-45, 45) // 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 < 8; i++) { ctx.strokeStyle = this.randomColor(this.lineColorMin, this.lineColorMax) 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 < 100; 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>
然后就是在你需要的页面
html代码只是简单的输入行,图片,加验证码替换
@keyup.enter.native="submitForm()是我登录时摁下Enter直接登录的方法可有可无,自己选择
<el-form-item prop="verifycode"> <el-input v-model="param.verifycode" placeholder="请输入验证码" class="identifyinput" @keyup.enter.native="submitForm()"> </el-input> </el-form-item> <el-form-item> <div class="identifybox"> <div @click="refreshCode"> <s-identify :identifyCode="identifyCode"></s-identify> </div> <el-button @click="refreshCode" type='text' class="textbtn">看不清,换一张</el-button> </div> </el-form-item>
然后就是script
首先引入SIdentify
import SIdentify from '../../components/page/identify.vue'
下面各种方法,验证及规则就直接写完了
export default { data: function() { /* 自定义验证码规则 */ const validateVerifycode = (rule, value, callback) => { if (value === '') { callback(new Error('请输入验证码')) } else if (value !== this.identifyCode) { console.log('validateVerifycode:', value); callback(new Error('验证码不正确!')) } else { callback() } } return { identifyCodes: '1234567890abcdefghijklmnopqrstuvwxyz', identifyCode: '', rules:{ verifycode: [{ required: true, trigger: 'blur', validator: validateVerifycode, }] } }; }, components:{ SIdentify }, mounted(){ this.identifyCode=''; this.makeCode(this.identifyCodes,4); disableBrowserBack(); history.pushState(null, null, document.URL); if (window.history && window.history.pushState) { $(window).on('popstate', function (){ window.history.pushState('forward', null, ''); window.history.forward(1); }); window.history.pushState('forward', null, ''); //在IE中必须得有这两行 window.history.forward(1); }, methods:{ randomNum(min, max) { return Math.floor(Math.random() * (max - min) + min) }, // 切换验证码 refreshCode() { this.identifyCode = '' this.makeCode(this.identifyCodes, 4) }, makeCode(o, l) { for (let i = 0; i < l; i++) { this.identifyCode += this.identifyCodes[ this.randomNum(0, this.identifyCodes.length)] } console.log(this.identifyCode) /* alert(this.identifyCode) */ } } }
到这就已经完成了,还可以添加css样式完美一下
.identifybox { display: flex; justify-content: space-between; margin-top: 7px; }
以上就是“vue+Element怎么实现登录随机验证码”这篇文章的所有内容,感谢各位的阅读!相信大家阅读完这篇文章都有很大的收获,小编每天都会为大家更新不同的知识,如果还想学习更多的知识,请关注亿速云行业资讯频道。
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