效果展示
第一步：创建验证码组件
这里是组件的代码，可以自行命名文件名，我这里命名为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: 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>第二步：引入验证码组件并注册使用
这里data里面的identifyCode的值就是所生成的验证码的值，可以通过该码自行发挥逻辑操作，SIdentify组件其实只是为了显示验证码图片而已，所以不用该组件还可以做成伪手机验证码登录
<template>
<div>
<SIdentify:identifyCode="identifyCode" >
</SIdentify>
</div>
</template>
// 引入登录验证组件
import SIdentify from "@/components/SIdentify";
<script>
export default {
name: "SIdentify",
components: { SIdentify },
data(){
return {
identifyCode: "", //密码登录图形验证码
identifyCodes: "1234567890abcdefghizklmnopqrstuvwxyz", //生成图形验证码的依据
}
},
methods:{
// 刷新验证码
refreshIdentifyCode() {
this.identifyCode = "";
this.makeIdentifyCode(4);
},
// 生成4位数的随机验证码
makeIdentifyCode(l) {
for (let i = 0; i < l; i++) {
this.identifyCode +=
this.identifyCodes[this.randomNum(0, this.identifyCodes.length)];
}
},
// 生成单个验证码
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min);
},
},
mounted() {
// 初始化验证码
this.identifyCode = "";
this.makeIdentifyCode(4);
},
}
</script>总结
到此这篇关于Vue实现验证码登录的文章就介绍到这了,更多相关Vue验证码登录内容请搜索阿兔在线工具以前的文章或继续浏览下面的相关文章希望大家以后多多支持阿兔在线工具！
