步骤1 创建一个名为identify.vue的子组件
<template> <div > <canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas> </div></template><script>export default { name: 'SIdentify', props: { // 默认注册码identifyCode: { type: String, default: "1234"},// 字体最小值fontSizeMin: { type: Number, default: 35},// 字体最大值fontSizeMax: { type: Number, default: 35},// 背景颜色色值最小值backgroundColorMin: { type: Number, default: 180},// 背景颜色色值最大值backgroundColorMax: { type: Number, default: 240},// 字体颜色色值最小值colorMin: { type: Number, default: 50},// 字体颜色色值最大值colorMax: { type: Number, default: 160},// 干扰线颜色色值最小值lineColorMin: { type: Number, default: 100},// 干扰线颜色色值最大值lineColorMax: { type: Number, default: 200},// 干扰点颜色色值最小值dotColorMin: { type: Number, default: 0},// 干扰点颜色色值最大值dotColorMax: { type: Number, default: 255},// 画布宽度contentWidth: { type: Number, default: 120},// 画布高度contentHeight: { type: Number, default: 40} }, 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) { // 随机生产字体颜色 ctx.fillStyle = this.randomColor(this.colorMin, this.colorMax) // 随机生成字体大小 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) // 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 < 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) { // 绘制干扰点 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>
步骤2 在子组件中进行注册和引用
<script> import SIdentify from "./common/sIdentify.vue"; export default { components: { SIdentify }, }</script>
步骤3 在主页面中使用子组件
1、template中:
<template> <div @click="refreshCode"> <s-identify :identifyCode="identifyCode"></s-identify> </div></template>
2、 data中:
data() { return { identifyCode: "", identifyCodes: "", }},
3、methods中:
methods: { // 生成随机数 randomNum(min, max) { max = max + 1 return Math.floor(Math.random() * (max - min) + min); }, // 更新验证码 refreshCode() { this.identifyCode = ""; this.makeCode(this.identifyCodes, 4); console.log('当前验证码==',this.identifyCode); }, // 随机生成验证码字符串 makeCode(data, len) { for (let i = 0; i < len; i++) { this.identifyCode += this.identifyCodes[this.randomNum(0, this.identifyCodes)] } },}
转载于:https://blog.csdn.net/Serena_tz/article/details/111866600
原文转载:http://www.shaoqun.com/a/504358.html
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步骤1创建一个名为identify.vue的子组件<template><div><canvasid="s-canvas":width="contentWidth":height="contentHeight"></canvas></div></template><
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