先给大家展示下效果图：

1.html代码

<div class="form-group" style="display: flex;"> <div> <span>验证码：</span> <input type="text" id="code" v-model="code" class="code" placeholder="请输入您的验证码" /> </div> <div class="login-code" @click="refreshCode"> <!--验证码组件--> <s-identify :identifyCode="identifyCode"></s-identify> </div> </div>

2.css样式

.code{ width:124px; height:31px; border:1px solid rgba(186,186,186,1);}.login-code{ cursor: pointer;}

3.js引入验证码组件,并且定义三个变量。

import SIdentify from '../components/sidentify'components: { SIdentify },data () { return { identifyCodes: "1234567890", identifyCode: "", code:"",//text框输入的验证码 }},

4.mounted里的代码

mounted(){ this.identifyCode = ""; this.makeCode(this.identifyCodes, 4); },

5.在created里初始化验证码

6.methods里添加以下方法。

需要用到的方法

//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) ]; } console.log(this.identifyCode);},

在提交表单的时候对验证码进行判断。

sidentify.vue组件代码：

<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>

总结

以上所述是小编给大家介绍的vue实现随机验证码功能的实例代码，希望对大家有所帮助，如果大家有任何疑问欢迎给我留言，小编会及时回复大家的！