本文实例为大家分享了Vue+Element实现登录随机验证码的具体代码,供大家参考,具体内容如下 验证码验证只是前端,无需后台交互 首先,创建一个identify.vue页面,用于写
本文实例为大家分享了Vue+Element实现登录随机验证码的具体代码,供大家参考,具体内容如下
验证码验证只是前端,无需后台交互
首先,创建一个identify.vue页面,用于写各种:随机数字/字母,随机颜色,干扰点/线
identify.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: 16
},
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: 112
},
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) {
var r = this.randomNum(min, max)
var g = this.randomNum(min, max)
var b = this.randomNum(min, max)
return 'rgb(' + r + ',' + g + ',' + b + ')'
},
drawPic() {
var canvas = document.getElementById('s-canvas')
var 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';
var x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
var 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 < 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>
然后就是在你需要的页面
html代码只是简单的输入行,图片,加验证码替换
@keyup.enter.native="submitForm()是我登录时摁下Enter直接登录的方法可有可无,自己选择
<el-form-item prop="verifycode">
<el-input v-model="param.verifycode" placeholder="请输入验证码" class="identifyinput" @keyup.enter.native="submitForm()">
</el-input>
</el-form-item>
<el-form-item>
<div class="identifybox">
<div @click="refreshCode">
<s-identify :identifyCode="identifyCode"></s-identify>
</div>
<el-button @click="refreshCode" type='text' class="textbtn">看不清,换一张</el-button>
</div>
</el-form-item>
然后就是script
首先引入SIdentify
import SIdentify from '../../components/page/identify.vue'
下面各种方法,验证及规则就直接写完了
export default {
data: function() {
const validateVerifycode = (rule, value, callback) => {
if (value === '') {
callback(new Error('请输入验证码'))
} else if (value !== this.identifyCode) {
console.log('validateVerifycode:', value);
callback(new Error('验证码不正确!'))
} else {
callback()
}
}
return {
identifyCodes: '1234567890abcdefghijklmnopqrstuvwxyz',
identifyCode: '',
rules:{
verifycode: [{
required: true,
trigger: 'blur',
validator: validateVerifycode,
}]
}
};
},
components:{
SIdentify
},
mounted(){
this.identifyCode='';
this.makeCode(this.identifyCodes,4);
disableBrowserBack();
history.pushState(null, null, document.URL);
if (window.history && window.history.pushState) {
$(window).on('popstate', function (){
window.history.pushState('forward', null, '');
window.history.forward(1);
});
window.history.pushState('forward', null, ''); //在IE中必须得有这两行
window.history.forward(1);
},
methods:{
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min)
},
// 切换验证码
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)
}
}
}
到这就已经完成了,还可以添加CSS样式完美一下
.identifybox {
display: flex;
justify-content: space-between;
margin-top: 7px;
}
验证码分享就这么多了。
--结束END--
本文标题: vue+Element实现登录随机验证码
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