vue图形验证码 vue实现图形验证码
公孙元二 人气:0想了解vue实现图形验证码的相关内容吗,公孙元二在本文为您仔细讲解vue图形验证码的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:vue图形验证码,vue图形验证,vue验证码,下面大家一起来学习吧。
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代码:
验证码组件:
src/common/sIdentify.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: 18 }, 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: 111 }, 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) { 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) // 绘制干扰线 // this.drawDot(ctx) // 绘制干扰点 }, // 绘制文本 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(-30, 30) // 字符旋转角度(不超过45度比较好) // 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>
父组件
<template> <div> <div>验证码测试</div> <div @click="refreshCode()" class="code" style="cursor:pointer;" title="点击切换验证码"> <s-identify :identifyCode="identifyCode"></s-identify> </div> </div> </template> <script> import { defineComponent } from 'vue'; import sIdentify from "@/common/sIdentify.vue"; // import axios from 'axios' export default defineComponent({ name: 'WatermarkTest', components: { sIdentify }, data() { return { identifyCode: "", identifyCodes: ['0','1','2','3','4','5','6','7','8','9','a','b','c','d'], //根据实际需求加入自己想要的字符 } }, mounted() { this.refreshCode() }, unmounted() { }, methods: { // 生成随机数 randomNum(min, max) { max = max + 1 return Math.floor(Math.random() * (max - min) + min); }, // 更新验证码 refreshCode() { this.identifyCode = ""; this.makeCode(this.identifyCodes, 4); console.log('当前验证码:',this.identifyCode); }, // 随机生成验证码字符串 makeCode(data, len) { console.log('data, len:', data, len) for (let i = 0; i < len; i++) { this.identifyCode += this.identifyCodes[this.randomNum(0, this.identifyCodes.length-1)] } }, }, }); </script>
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