1. Import 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: {
// Generate a random number
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min);
},
// Generate a random color
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";
// Draw the background
ctx.fillStyle = this.randomColor(
this.backgroundColorMin,
this.backgroundColorMax
);
ctx.fillRect(0.0.this.contentWidth, this.contentHeight);
// Draw text
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);
// Change the coordinates origin and rotation Angle
ctx.translate(x, y);
ctx.rotate((deg * Math.PI) / 180);
ctx.fillText(txt, 0.0);
// Restore the coordinates origin and rotation Angle
ctx.rotate((-deg * Math.PI) / 180);
ctx.translate(-x, -y);
},
drawLine(ctx) {
// Draw interference lines
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) {
// Draw interference points
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>
Copy the code
2. Procedure
import SIdentify from "@/components/SIdentify";
components: {
SIdentify
}
<s-identify
class="identify"
:identifyCode="identifyCode"
@click.native="refreshCode"
></s-identify>
data(){
return {
identifyCodes: "1234567890"./ / random code
identifyCode: "".// Generate random code
code: "" // Text Specifies the verification code entered in the box}}// Initializes the verification code
mounted() {
this.identifyCode = "";
this.makeCode(this.identifyCodes, 4);
},
randomNum(min, max) {
return Math.floor(Math.random() * (max - min) + min);
},
// Reset the verification code
refreshCode() {
this.identifyCode = "";
this.code = "";
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) ]; }},Copy the code