是这个样子
接下来上代码
创建一个组件。显示验证码图片
<template> <div> <canvas :width="contentWidth" :height="contentHeight"></canvas> </div> </template> <script> export default{ name: 'SIdentify', props: { identifyCode: { // 默认注册码 type: String, default: '1234' }, fontSizeMin: { // 字体最小值 type: Number, default: 25 }, fontSizeMax: { // 字体最大值 type: Number, default: 35 }, 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: 90 }, contentHeight: { // 容器高度 type: Number, default: 38 } }, 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 = '#e6ecfd' 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>
在登录页面中
验证码输输入框
<el-form-item prop="code"> <el-input type="text" v-model="formLogin.code" placeholder="- - - -"> <template slot="prepend">验证码</template> <template slot="append"> <div @click="refreshCode"> <Identify :identifyCode="identifyCode"></Identify> </div> </template> </el-input> </el-form-item>
登录按钮
<el-button-group> <el-button @click="submit" type="primary">登录</el-button> </el-button-group>
引入之前的组件(在例子中它叫identify)
import Identify from './identify'
在登录组件中引入Identify （这是验证码组件）这一部分略
在data中
// 表单 formLogin: { username: "", password: "", code: "" }, identifyCodes: '1234567890abcdefjhijklinopqrsduvwxyz', identifyCode: '', // 校验 rules: { username: [ { required: true, message: "请输入用户名", trigger: "blur" } ], password: [{ required: true, message: "请输入密码", trigger: "blur" }], code: [{ required: true, message: "请输入验证码", trigger: "blur" }] }
在mounted中
mounted () { // 初始化验证码 this.identifyCode = '' this.makeCode(this.identifyCodes, 4) },
在method中
// 引入验证接口 ...mapActions("d2admin/account", ["login"]), // 重置验证码 refreshCode () { this.identifyCode = '' 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)] } }, randomNum (min, max) { return Math.floor(Math.random() * (max - min) + min) }, /** * @description 提交表单 */ // 提交登录信息 submit() { if (this.formLogin.code.toLowerCase() !== this.identifyCode.toLowerCase()) { this.$message.error('请填写正确验证码') this.refreshCode() return } this.$refs.loginForm.validate(valid => { if (valid) { // 登录 // 注意 这里的演示没有传验证码 // 具体需要传递的数据请自行修改代码 this.login({ vm: this, username: this.formLogin.username, password: this.formLogin.password }); } else { // 登录表单校验失败 this.$message.error("表单校验失败"); } }); }