1、组件
<!--loginCode登录验证码组件-->
<template>
<canvas id="canvasCode" :width="contentWidth" :height="contentHeight" />
</template>
<script>
export default {
name: 'LoginCode',
props: {
identifyCode: {
type: String,
default: '6834'
},
fontSizeMin: {
type: Number,
default: 20
},
fontSizeMax: {
type: Number,
default: 38
},
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: 110
},
contentHeight: {
type: Number,
default: 46
}
},
watch: {
identifyCode() {
this.drawPic()
}
},
mounted() {
this.drawPic()
},
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) {
const r = this.randomNum(min, max)
const g = this.randomNum(min, max)
const b = this.randomNum(min, max)
return 'rgb(' + r + ',' + g + ',' + b + ',' + '0.7' + ')'
},
drawPic() {
const canvas = document.getElementById('canvasCode')
const 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'
const x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
const 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()
}
}
}
}
</script>
2、登录页面上使用
data里面定义值
identifyCodeType: 'abcdefghuiokvbnm1234567890', // 定义验证类型 1.数字 2.字母
identifyCode: '',
inputCode: '', // text框输入的验证码
// 导入组件
import loginCode from '@/components/loginCode.vue'
<el-form-item prop="username" style="position: relative;">
<!-- <span class="el-icon-document" style="font-size:20px;color:#A7A7A7;z-index:1;position: absolute;top:29%;" /> -->
<span class="svg-container">
<svg-icon icon-class="login-user1" class="svg-icon" />
</span>
<el-input
v-model="inputCode"
style="width: 305px"
type="text"
placeholder="请输入您的验证码"
/>
<div style="position: absolute;top:2px;right:0px" @click="refreshCode()">
<loginCode :identify-code="identifyCode" />
</div>
<!-- <div style="display: flex; align-items: center; justify-content: center"> -->
<!-- <span>验证码：</span> -->
<!-- <el-input
v-model="inputCode"
style="width: 180px"
type="text"
placeholder="请输入您的验证码"
/> -->
<!-- <div @click="refreshCode()">
<loginCode :identify-code="identifyCode" />
</div> -->
<!-- </div> -->
</el-form-item>
mounted() {
this.refreshCode()
},
// 验证码规则
getSubmitData() {
if (this.inputCode === '') {
alert('请输入验证码')
return
}
if (this.identifyCode !== this.inputCode) {
this.inputCode = ''
this.refreshCode()
alert('请输入正确的验证码!')
return
} else {
this.$message({
message: '验证成功',
type: 'success'
})
}
},
// 验证码
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min)
},
// 初始化验证码
refreshCode() {
this.identifyCode = '' // 输入框置空
this.makeCode(this.identifyCodeType, 4) // 验证码长度为4
},
// 随机切换验证码
makeCode(o, l) {
for (let i = 0; i < l; i++) {
this.identifyCode +=
this.identifyCodeType[
this.randomNum(0, this.identifyCodeType.length)
]
}
console.log(this.identifyCode)
},
验证码校验和登录合并
handleLogin() {
// 验证码校验
if (this.inputCode === '') {
alert('请输入验证码')
return
}
if (this.identifyCode !== this.inputCode) {
this.inputCode = ''
this.refreshCode()
alert('请输入正确的验证码!')
return
} else {
this.$message({
message: '验证成功',
type: 'success'
})
}
