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() },

