1:创建组件的文件(简单粗暴上代码,方便复制)
<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: 35
},
backgroundColorMin: {
type: Number,
default: 200
},
backgroundColorMax: {
type: Number,
default: 220
},
dotColorMin: {
type: Number,
default: 60
},
dotColorMax: {
type: Number,
default: 120
},
contentWidth: {
type: Number,
default: 116
},
contentHeight: {
type: Number,
default: 38
}
},
methods: {
randomNum (min, max) {
return Math.floor(Math.random() * (max - min) + min)
},
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'
ctx.fillStyle = this.randomColor(this.backgroundColorMin, this.backgroundColorMax)
ctx.fillRect(0, 0, this.contentWidth, this.contentHeight)
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)
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(-30, 30)
ctx.translate(x, y)
ctx.rotate(deg * Math.PI / 180)
ctx.fillText(txt, 0, 0)
ctx.rotate(-deg * Math.PI / 180)
ctx.translate(-x, -y)
},
drawLine (ctx) {
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) {
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>
2:在需要用的地方引用组件
<template>
<li class="phonenumber" style="border:0;padding-bottom: 0;">
<div>验证码:</div>
</li>
<li class="phonenumber">
<div class="flexbox">
<div>
<input type="text" placeholder="请填写验证码" class="inputText" v-model=".code" />
</div>
<!-- 引入验证码组件 -->
<div @click="changeCode()">
<identify :identifyCode="identifyCode"></identify>
</div>
</div>
</li>
</template>
<script>
import identify from "@/common/identify";
export default {
name: "",
data() {
return {
identifyCode: 'm6a8',
identifyCodes: '123456789abcdefghjkmnpqrstuvwxyz',
};
},
mounted() {
this.identifyCode = ''
this.makeCode(this.identifyCodes, 4)
},
methods: {
handleSubmit() {
if (this.identifyCode != this.phone.code ) {
this.$toast("验证码不正确");
this.changeCode();
} else {
this.$toast("验证码正确");
}
},
changeCode() {
this.identifyCode = ''
this.makeCode(this.identifyCodes, 4)
},
randomNum(min, max) {
max = max + 1
return Math.floor(Math.random() * (max - min) + min)
},
makeCode(data, len) {
for (let i = 0; i < len; i++) {
this.identifyCode += data[this.randomNum(0, data.length - 1)]
}
}
},
components: {
identify
}
};
</script>