【vue】canvas验证码组件--数字/数字加字母

<!-- 基于canvas的数字/数字+字符验证码 -->
<!-- 调用格式
<s-identify
@func="getMsgFormSon"
:isRefreshCode="isRefreshCode"
:identifyCodes="identifyCodes" //可选传，选传写法有要求
></s-identify> -->
<template>
<div class="s-canvas">
<canvas id="s-canvas" :width="contentWidth" :height="contentHeight"></canvas>
</div>
</template>
<script>
export default {
name: "SIdentify",
props: {
isRefreshCode: {
type: Boolean,
default: false
},
identifyCodes: {
type: Array
},
identifyLen: {
type: Number,
default: 4
},
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: 32
}
},
data() {
return {
nums: [
"1",
"2",
"3",
"4",
"5",
"6",
"7",
"8",
"9",
"0",
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z",
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
"m",
"n",
"o",
"p",
"q",
"r",
"s",
"t",
"u",
"v",
"w",
"x",
"y",
"z"
],
identifyText: ""
};
},
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 + ")";
},
// 绘制干扰线
drawLine(ctx) {
for (let i = 0; i < 6; 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();
}
},
// 绘制干扰点
drawDot(ctx) {
for (let i = 0; i < 50; i++) {
ctx.fillStyle = this.randomColor(0, 255);
ctx.beginPath();
ctx.arc(
this.randomNum(0, this.contentWidth),
this.randomNum(0, this.contentHeight),
1,
0,
* Math.PI
);
ctx.fill();
}
},
// 生成l长度的验证码
makeCode(o, l) {
let identifyCodes = o;
this.identifyText = "";
for (let i = 0; i < l; i++) {
this.identifyText +=
identifyCodes[this.randomNum(0, identifyCodes.length)];
}
},
// 验证码文本
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.identifyText.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);
},
// 验证码图形
drawPic() {
let identifyCodesArray = this.identifyCodes
? this.identifyCodes
: this.nums;
this.makeCode(identifyCodesArray, this.identifyLen);
let identifyCode = "";
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);
console.log(this.identifyText, "huizhi");
// 绘制文字
for (let i = 0; i < this.identifyLen; i++) {
this.drawText(ctx, this.identifyText[i], i);
identifyCode += this.identifyText[i];
}
// for (let i = 0; i < this.identifyArray.length; i++) {
// this.drawText(ctx, this.identifyArray[i], i);
// }
this.drawLine(ctx);
this.drawDot(ctx);
console.log(identifyCode, "要传的值");
// 向父组件传值
this.$emit("func", identifyCode);
}
},
watch: {
if (this.isRefreshCode) {
this.drawPic();
}
},
mounted() {
this.drawPic();
}
};
</script>
<style lang="scss" scoped>
.s-canvas {
height: 32px;
canvas {
margin-top: 1px;
margin-left: 8px;
}
}
</style>

<template>
<div>
<el-input v-model="verificationCode" placeholder="验证码" />
<div class="identify-code" @click="refreshCode">
<!--验证码组件-->
<s-identify @func="getSidentifyCode" :isRefreshCode="isRefreshCode"></s-identify>
</div> </div>
</template>
<script>
import Vue from "vue";
import SIdentify from "./common/SIdentify";export default {
components: { SIdentify },
data() {
return {
verificationCode: "",
identifyCode: "",
isRefreshCode: false,
};
},
created() {
// this.refreshCode();
},
mounted() {},
watch: {},
methods: {
refreshCode() {
this.identifyCode = "";
this.isRefreshCode = true; //更改状态--SIdentify组件中监听该状态
},
getSidentifyCode(data) {
this.identifyCode = data;
this.isRefreshCode = false;
console.log(this.identifyCode, "接收到的code");
}
}
};
</script>
<style lang="scss" scoped>
.identify-code {
display: inline-block;
}
}
</style>

<template>
<div>
<el-input v-model="verificationCode" placeholder="验证码" />
<div class="identify-code" @click="refreshCode">
<!--验证码组件-->
<s-identify @func="getSidentifyCode" :isRefreshCode="isRefreshCode"></s-identify>
</div> </div>
</template>
<script>
import Vue from "vue";
import SIdentify from "./common/SIdentify";export default {
components: { SIdentify },
data() {
return {
verificationCode: "",
identifyCodes: ["1", "2", "3", "4", "5", "6", "7", "8", "9", "0"],
identifyCode: "",
isRefreshCode: false,
};
},
created() {
this.refreshCode();
},
mounted() {},
watch: {},
methods: {
refreshCode() {
this.identifyCode = "";
this.isRefreshCode = true; //更改状态--SIdentify组件中监听该状态
// 随机排序
if (this.identifyCodes.length) {
let tempCodesArray = this.identifyCodes.sort(function() {
return Math.random() - 0.5;
});
this.identifyCodes = tempCodesArray;
}
},
getSidentifyCode(data) {
this.identifyCode = data;
this.isRefreshCode = false;
console.log(this.identifyCode, "接收到的code");
}
}
};
</script>
<style lang="scss" scoped>
.identify-code {
display: inline-block;
}
}
</style>

SIdentify.vue<script>
export default {
...
watch: {
identifyCodes() {
this.drawPic();
}
//,
// isRefreshCode() {
// this.drawPic();
// }
}};
</script>
<style lang="scss" scoped>
.
.
.
</style>