样式
image
image
新建组件identify
// 图片验证码
<template>
<div class="s-canvas">
<canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas>
</div>
</template>
<script>
export default {
name: 'identify',
props: {
identifyCode: { // 默认注册码
type: String,
default: '1234'
},
fontSizeMin: { // 字体最小值
type: Number,
default: 20
},
fontSizeMax: { // 字体最大值
type: Number,
default: 27
},
backgroundColorMin: { // 验证码图片背景色最小值
type: Number,
default: 200
},
backgroundColorMax: { // 验证码图片背景色最大值
type: Number,
default: 220
},
dotColorMin: { // 背景干扰点最小值
type: Number,
default: 60
},
dotColorMax: { // 背景干扰点最大值
type: Number,
default: 120
},
contentWidth: { // 容器宽度
type: Number,
default: 64
},
contentHeight: { // 容器高度
type: Number,
default: 32
}
},
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(50, 160) // 随机生成字体颜色
ctx.font = this.randomNum(this.fontSizeMin, this.fontSizeMax) + 'px SimHei' // 随机生成字体大小
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 < 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) {
// 绘制干扰点
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>
<style scoped>
</style
页面使用
<template>
<div class="login">
<div class="loginBox">
<div class="title">
</div>
<div class="login_title">
<span class="logintitle">登录</span>
<span
class="signin"
@click="signin"
>注册</span>
</div>
<div class="loginInput">
<el-form
:model="loginForm"
:rules="rules"
class="loginForm"
ref="loginFormRef"
>
<el-form-item prop="username">
<el-input
prefix-icon="el-icon-mobile-phone"
placeholder="请输入您的手机号"
v-model="loginForm.username"
></el-input>
</el-form-item>
<el-form-item prop="password">
<el-input
prefix-icon="el-icon-lock"
placeholder="请输入您的密码"
type="password"
v-model="loginForm.password"
></el-input>
</el-form-item>
<el-form-item prop="security">
<el-input
prefix-icon="el-icon-document-checked"
placeholder="请输入图形校验码"
v-model="loginForm.security"
></el-input>
<div
@click="changeCode()"
class="identify"
>
<!-- 引入验证码组件 -->
<identify :identifyCode="identifyCode"></identify>
</div>
</el-form-item>
<div class="bottom">
<span @click="RetrievingAccount">找回账户</span>
<span@click="forgetPassword">忘记密码</span@click=>
</div>
<el-form-item>
<el-button
type="
primary"
@click="handleLogin"
>登录</el-button>
</el-form-item>
</el-form>
</div>
</div>
</div>
</template>
<script>
// 引入验证码组件
import identify from '../components/identify'
export default {
// 组件名称
name: '',
// 局部注册的组件
components: { identify },
// 组件参数 接收来自父组件的数据
props: {},
// 组件状态值
data () {
return {
loginForm: {
username: '',
password: '',
security: '',
},
rules: {
username: [
{ required: true, message: '请输入您的手机号', trigger: 'blur' },
],
password: [
{ required: true, message: '请输入您的密码', trigger: 'blur' }
],
security: [
{ required: true, message: '请输入图形校验码', trigger: 'blur' }
]
},
// 验证码初始值
identifyCode: '1234',
// 验证码的随机取值范围
identifyCodes: '1234567890'
}
},
// 计算属性
computed: {},
// 侦听器
watch: {},
// 生命周期钩子 注：没用到的钩子请自行删除
created () { },
mounted () {
// 刷新页面就生成随机验证码
this.identifyCode = ''
this.makeCode(this.identifyCodes, 4)
},
// 组件方法
methods: {
// 点击验证码刷新验证码
changeCode () {
this.identifyCode = ''
this.makeCode(this.identifyCodes, 4)
},
// 生成一个随机整数 randomNum(0, 10) 0 到 10 的随机整数， 包含 0 和 10
randomNum (min, max) {
max = max + 1
return Math.floor(Math.random() * (max - min) + min)
},
// 随机生成验证码字符串
makeCode (data, len) {
for (let i = 0; i < len; i++) {
this.identifyCode += data[this.randomNum(0, data.length - 1)]
}
console.log(this.identifyCode);
},
signin () {
console.log('注册');
},
// 登录
handleLogin () {
console.log(this.loginForm);
},
RetrievingAccount () {
console.log('找回账户');
},
forgetPassword () {
console.log('忘记密码');
}
}
}
</script>
<style scoped lang="scss">
</style>
