如果需要使用滑塊驗證:vue登錄時人機驗證-滑塊驗證
隨機驗證碼
效果圖:
實現步驟:
1、封裝Identity組件
<template> <div class="s-canvas"> <canvas id="s-canvas" :width="contentWidth" :height="contentHeight" style="cursor: pointer;"></canvas> </div> </template> <script> export default { name: 'SIdentify', props: { identifyCode: { //默認注冊碼 type: String, default: '1234' }, fontSizeMin: { // 字體最小值 type: Number, default: 25 }, fontSizeMax: { // 字體最大值 type: Number, default: 35 }, backgroundColorMin: { // 驗證碼圖片背景色最小值 type: Number, default: 200 }, backgroundColorMax: { // 驗證碼圖片背景色最大值 type: Number, default: 220 }, dotColorMin: { // 背景干擾點最小值 type: Number, default: 60 }, dotColorMax: { // 背景干擾點最大值 type: Number, default: 120 }, contentWidth: { //容器寬度 type: Number, default: 116 }, contentHeight: { //容器高度 type: Number, default: 38 } }, methods: { // 生成一個隨機數 randomNum(min, max) { return Math.floor(Math.random() * (max - min) + min) }, // 生成一個隨機的顏色 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' // 繪制背景 ctx.fillStyle = this.randomColor(this.backgroundColorMin, this.backgroundColorMax) ctx.fillRect(0, 0, this.contentWidth, this.contentHeight) // 繪制文字 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(50, 160) //隨機生成字體顏色 ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' //隨機生成字體大小 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) // 修改坐標原點和旋轉角度 ctx.translate(x, y) ctx.rotate((deg * Math.PI) / 180) ctx.fillText(txt, 0, 0) // 恢復坐標原點和旋轉角度 ctx.rotate((-deg * Math.PI) / 180) ctx.translate(-x, -y) }, drawLine(ctx) { // 繪制干擾線 for (let i = 0; i < 4; i++) { ctx.strokeStyle = this.randomColor(100, 200) 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) { // 繪制干擾點 for (let i = 0; i < 30; 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>
2、Login.vue中引入並注冊
import Identify from './components/Identify'
components: { Identify }
3、頁面中添加Identity組件
<div @click="handleRefreshCode()"> <Identify :identifyCode="identifyCode"></Identify> </div>
4、data中添加兩個參數
identifyCode: '1234', // 驗證碼初始值 identifyCodes: '1234567890' // 驗證碼的隨機取值范圍
5、methods中添加handleRefreshCode()方法
// 刷新驗證碼 handleRefreshCode() { this.identifyCode = '' this.makeCode(this.identifyCodes, 4) }, // 生成一個隨機整數 randomNum(0, 10) 0 到 10 的隨機整數, 包含 0 和 10 randomNum(min, max) { max = max + 1 return Math.floor(Math.random() * (max - min) + min) }, // 隨機生成驗證碼字符串 makeCode(data, len) { for (let i = 0; i < len; i++) { this.identifyCode += data[this.randomNum(0, data.length - 1)] } },
6、當前默認初始驗證碼為“1234”,如果初始狀態需要隨機驗證碼在頁面掛載后觸發handleRefreshCode()函數即可
mounted(){ this.handleRefreshCode() },