vue实现随机验证码(数字类型字母类型)业务适用于登录页网页安全码
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📒技术聊斋
使用流程:
- 封装
securityCode.vue
组件 - 页面使用组件
详细使用 已在组件中添加注释👇
(1)封装 securityCode 组件
<!--securityCode组件-->
<template>
<canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas>
</template>
<script>
export default
name: "securityCode",
props:
identifyCode:
type: String,
default: "1234",
,
fontSizeMin:
type: Number,
default: 16,
,
fontSizeMax:
type: Number,
default: 40,
,
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: 112,
,
contentHeight:
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 = 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";
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 < 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();
,
,
watch:
identifyCode()
this.drawPic();
,
,
mounted()
this.drawPic();
,
;
</script>
(2)页面使用
<template>
<div style="display: flex; align-items: center; justify-content: center">
<span>验证码:</span>
<el-input
style="width: 180px"
type="text"
v-model="inputCode"
placeholder="请输入您的验证码"
/>
<div @click="refreshCode()">
<!--验证码组件-->
<SecurityCode :identifyCode="identifyCode"></SecurityCode>
</div>
<el-button type="primary" @click="getSubmitData()">提交</el-button>
</div>
</template>
<script>
//导入组件
import SecurityCode from "@/components/securityCode.vue";
export default
components: SecurityCode ,
data()
return
identifyCodeType: "1234567890", //定义验证类型 1.数字 2.字母
identifyCode: "",
inputCode: "", //text框输入的验证码
;
,
methods:
//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);
,
,
mounted()
this.refreshCode();
,
;
</script>
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