本文例項為大家分享了vue專案實現圖形驗證碼的具體程式碼，供大家參考，具體內容如下

效果預覽：（專案要求清爽一點，所以沒背景。但是下面的程式碼會把背景干擾寫進去）

1.下載identify外掛，命令：npm i identify

2.在你的components目錄新建一個vue元件，我的命名是：sIdentify.vue

3.在元件內把下面的程式碼copy過去(可以自定義哈！)

<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: 35
    },fontSizeMax: {
      type: Number,backgroundColorMin: {
      type: Number,default: 180
    },backgroundColorMax: {
      type: Number,default: 240
    },colorMin: {
      type: Number,default: 50
    },colorMax: {
      type: Number,default: 160
    },lineColorMin: {
      type: Number,default: 100
    },lineColorMax: {
      type: Number,default: 200
    },dotColorMin: {
      type: Number,default: 0
    },dotColorMax: {
      type: Number,default: 255
    },contentWidth: {
      type: Number,default: 120
    },contentHeight: {
      type: Number,default: 40
    }
  },methods: {
    // 生成一個隨機數
    randomNum(min,max) {
      return Math.floor(Math.random() * (max - min) + min);
    },// 生成一個隨機的顏色
    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 + ",
 
程式設計客棧" + b + ")";
    },transparent() {
      return "rgb(255,255,255)";
    },drawPic() {
      let canvas = document.getElementById("s-canvas");
      let ctx = canvas.getContext("2d");
      ctx.textBaseline = "bottom";
      // 繪製背景
      // ctx.fillStyle = this.randomColor(
      //   this.backgroundColorMin,//   this.backgroundColorMax
      // );
      ctx.fillStyle = this.transparent();
      ctx.fillRect(0,this.contentWidth,this.contentHeight);
      // 繪製文字
      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.contenwWvROPsas
 
tWidth / (this.identifyCode.length + 1));
      let y = this.randomNum(this.fontSizeMax,this.contentHeight - 5);
      var deg = this.randomNum(-10,10);
      // 修改座標原點和旋轉角度
      ctx.translate(x,y);
      ctx.rotate((deg * Math.PI) / 180);
      ctx.fillText(txt,0);
      // 恢復座標原點和旋轉角度
      ctx.rotate((-deg * Math.PI) / 180);
      ctx.translate(-x,-y);
    },drawLine(ctx) {
      // 繪製干擾線
      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.contentHeight)
        );
        ctx.stroke();
      }
    },drawDot(ctx) {
      // 繪製干擾點
      for (let i = 0; i < 100; i++) {
        ctx.fillStyle = this.randomColor(0,255);
        ctx.beginPath();
        ctx.arc(
          this.randomNum(0,
 
程式設計客棧   this.randomNum(0,this.contentHeight),1,2 * Math.PI
        );
        ctx.fill();
      }
    }
  },watch: {
    identifyCode() {
      this.drawPic();
    }
  },mounted() {
    this.drawPic();
  }
};
</script>

4.在你需要驗證碼的頁面引入元件並寫好方法：

<template>
<div class="get-code" @click="refreshCode()">
    <s-identify :identifyCode="identifyCode"></s-identify>
</div>
</template>
<script>
    import SIdentify from "@/components/sIdentify.vue";
    export default {
        components程式設計客棧: { SIdentify },data() {
           return {
                identifyCode: "",identifyCodes: "0123456789abcdwerwshdjeJKDHRJHKOOPLMKQ",//隨便打的
            }
        },methods: {            
           refreshCode() {//
             this.identifyCode = "";
             this.makeCode(this.identifyCodes,4);
           },randomNum (min,max) {
             max = max + 1
             return Math.floor(Math.random() * (max - wWvROPsasmin) + min)
           },// 隨機生成驗證碼字串
           makeCode (data,len) {
             for (let i = 0; i < len; i++) {
             this.identifyCode += data[this.randomNum(0,data.length - 1)]
           }
        }
    }
</script>

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。