vue+element-ui集成随机验证码+用户名+密码的form表单验证功能
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2022-03-03 11:28:54
在登入页面,我们往往需要通过输入验证码才能进行登入,那我们下面就详讲一下在vue项目中如何配合element-ui实现这个功能
第一步:自定义一个生产随机验证...
在登入页面,我们往往需要通过输入验证码才能进行登入,那我们下面就详讲一下在vue项目中如何配合element-ui实现这个功能
第一步:自定义一个生产随机验证码的组件,其本质是使用canvas绘制,详细代码如下:
<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' }, fontsi*: { 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.fontsi*, 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>
第二步:使用该组件:
我们首先新建一个vue组件,在该组件进行布局,其中还包括用户名和密码的验证(这只是前端的简单验证,真实项目中还需要请求登入接口进行后端验证)
<template> <el-form class="login-form" status-icon :rules="loginrules" ref="loginform" :model="loginform" label-width="0"> <el-form-item prop="username"> <el-input size="small" @keyup.enter.native="handlelogin" v-model="loginform.username" auto-complete="off" placeholder="请输入用户名"> <i slot="prefix" class="icon-yonghu"></i> </el-input> </el-form-item> <el-form-item prop="password"> <el-input size="small" @keyup.enter.native="handlelogin" :type="passwordtype" v-model="loginform.password" auto-complete="off" placeholder="请输入密码"> <i class="el-icon-view el-input__icon" :style="fontstyle" slot="suffix" @click="showpassword"></i> <i slot="prefix" class="icon-mima"></i> </el-input> </el-form-item> <el-form-item prop="verifycode"> <!-- 注意:prop与input绑定的值一定要一致,否则验证规则中的value会报undefined,因为value即为绑定的input输入值 --> <el-input v-model="loginform.verifycode" placeholder="请输入验证码" class="identifyinput"></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> <el-checkbox v-model="checked">记住账号</el-checkbox> <el-form-item> <el-button type="primary" size="small" @click.native.prevent="handlelogin" class="login-submit">登录</el-button> </el-form-item> </el-form> </template>
第三步:生产随机码与进行登入验证
<script> import { isvalidusername } from '@/utils/validate' import sidentify from '@/components/identify/identify.vue' export default { name: 'userlogin', data() { // 用户名自定义验证规则 const validateusername = (rule, value, callback) => { if (!isvalidusername(value)) { callback(new error('请输入正确的用户名')) } else { console.log('user', value) callback() } } // 验证码自定义验证规则 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 { fontstyle: { }, loginform: { username: 'admin', password: '123456', verifycode: '' }, checked: false, identifycodes: '1234567890', identifycode: '', loginrules: { // 绑定在form表单中的验证规则 username: [ { required: true, trigger: 'blur', validator: validateusername } ], password: [ { required: true, message: '请输入密码', trigger: 'blur' }, { min: 6, message: '密码长度最少为6位', trigger: 'blur' } ], verifycode: [ { required: true, trigger: 'blur', validator: validateverifycode } ] }, passwordtype: 'password' } }, components: { sidentify }, created() { }, mounted() { // 验证码初始化 this.identifycode = '' this.makecode(this.identifycodes, 4) }, computed: { }, props: [], methods: { // 通过改变input的type使密码可见 showpassword() { this.fontstyle === '' ? (this.fontstyle = 'color: red') : (this.fontstyle = '') // 改变密码可见按钮颜色 this.passwordtype === '' ? (this.passwordtype = 'password') : (this.passwordtype = '') }, // 点击登入按钮 handlelogin() { this.$refs.loginform.validate(valid => { if (valid) { this.$store.dispatch('login', this.loginform).then(res => { this.$router.push({ path: '/dashboard/dashboard' }) }) } }) }, // 生成随机数 randomnum(min, max) { return math.floor(math.random() * (max - min) + min) }, // 切换验证码 refreshcode() { this.identifycode = '' this.makecode(this.identifycodes, 4) }, // 生成四位随机验证码 makecode(o, l) { for (let i = 0; i < l; i++) { this.identifycode += this.identifycodes[ this.randomnum(0, this.identifycodes.length) ] } console.log(this.identifycode) } } } </script> <style scoped> .identifybox{ display: flex; justify-content: space-between; margin-top:7px; } .iconstyle{ color:#409eff; } </style>
最后的效果如下,当我们输入之后鼠标失去焦点就会进行验证:
总结
以上所述是小编给大家介绍的vue+element-ui集成随机验证码+用户名+密码的form表单验证功能,希望对大家有所帮助
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