登录界面

SIdentify

创建验证码组件，实现绘画出图片验证码

<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: 25 }, fontSizeMax: { type: Number, default: 30 }, backgroundColorMin: { type: Number, default: 255 }, backgroundColorMax: { type: Number, default: 255 }, colorMin: { type: Number, default: 0 }, colorMax: { type: Number, default: 160 }, lineColorMin: { type: Number, default: 100 }, lineColorMax: { type: Number, default: 255 }, dotColorMin: { type: Number, default: 0 }, dotColorMax: { type: Number, default: 255 }, contentWidth: { type: Number, default: 112 }, contentHeight: { type: Number, default: 31 } }, 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(this.colorMin, this.colorMax) ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' let x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1)) let 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 < 5; 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 < 80; 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><style scoped> .s-canvas { height: 38px; } .s-canvas canvas{ margin-top: 1px; margin-left: 8px; }</style>

在登录界面引入验证码组件并注册

import SIdentify from '@/components/common/SIdentify' components: { SIdentify },

登录的form

<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="0px" class="demo-ruleForm"> <el-form-item prop="username"> <el-input v-model="ruleForm.username" placeholder="账号"> <i slot="prepend" class="el-icon-s-custom"/> </el-input> </el-form-item> <el-form-item prop="password"> <el-input type="password" placeholder="密码" v-model="ruleForm.password"> <i slot="prepend" class="el-icon-lock"/> </el-input> </el-form-item> <el-form-item prop="code"> <el-row :span="24"> <el-col :span="12"> <el-input v-model="ruleForm.code" auto-complete="off" placeholder="请输入验证码" size="" @keyup.enter.native="submitForm('ruleForm')"></el-input> </el-col> <el-col :span="12"> <div class="login-code" @click="refreshCode"> <!--验证码组件--> <s-identify :identifyCode="identifyCode"></s-identify> </div> </el-col> </el-row> </el-form-item> <el-form-item> <div class="login-btn"> <el-button type="primary" @click="submitForm()">登录</el-button> </div> </el-form-item> <p style="font-size:12px;line-height:30px;color:#eaeaea;">Tips : 请输入账号密码登陆</p> </el-form>

点击刷新验证码

randomNum (min, max) { return Math.floor(Math.random() * (max - min) + min) }, 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) ] } }

总结

以上所述是小编给大家介绍的Vue 实现登录界面验证码功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对网站的支持！
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