vue2动态生成(绘制)图形验证码(验证码图片)

 

方案1:js绘制条形验证码

 

参考文档:https://blog.csdn.net/LOVE_mingjing/article/details/130622848

 

utils文件夹下新建GVerify.js文件:

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function GVerify(options) {
  // 创建一个图形验证码对象,接收options对象为参数
  this.options = {
    // 默认options参数值
    id: "", // 容器Id
    canvasId: "verifyCanvas", // canvas的ID
    width: "80", // 默认canvas宽度
    height: "30", // 默认canvas高度
    type: "blend", // 图形验证码默认类型 blend:数字字母混合类型、number:纯数字、letter:纯字母
    code: "",
  };
 
  if (Object.prototype.toString.call(options) === "[object Object]") {
    // 判断传入参数类型
    for (var i in options) {
      // 根据传入的参数,修改默认参数值
      this.options[i] = options[i];
    }
  } else {
    this.options.id = options;
  }
 
  this.options.numArr = "0,1,2,3,4,5,6,7,8,9".split(",");
  this.options.letterArr = getAllLetter();
 
  this._init();
  this.refresh();
}
 
GVerify.prototype = {
  /** 版本号**/
  version: "1.0.0",
 
  /** 初始化方法**/
  _init: function () {
    var con = document.getElementById(this.options.id);
    var canvas = document.createElement("canvas");
    this.options.width = "140";
    this.options.height = "56";
    canvas.id = this.options.canvasId;
    canvas.width = this.options.width;
    canvas.height = this.options.height;
    canvas.style.cursor = "pointer";
    canvas.innerHTML = "浏览器不支持canvas";
    con.appendChild(canvas);
    var parent = this;
    canvas.onclick = function () {
      parent.refresh();
    };
  },
 
  /** 生成验证码**/
  refresh: function () {
    var canvas = document.getElementById(this.options.canvasId);
    if (canvas.getContext) {
      var ctx = canvas.getContext("2d");
    }
    ctx.textBaseline = "middle";
 
    ctx.fillStyle = randomColor(180, 240);
    ctx.fillRect(0, 0, this.options.width, this.options.height);
 
    if (this.options.type === "blend") {
      // 判断验证码类型
      var txtArr = this.options.numArr.concat(this.options.letterArr);
    } else if (this.options.type === "number") {
      var txtArr = this.options.numArr;
    } else {
      var txtArr = this.options.letterArr;
    }
 
    for (var i = 1; i <= 4; i++) {
      var txt = txtArr[randomNum(0, txtArr.length)];
      this.options.code += txt;
      ctx.font =
        randomNum(this.options.height / 2, this.options.height) + "px SimHei"; // 随机生成字体大小
      ctx.fillStyle = randomColor(50, 160); // 随机生成字体颜色
      ctx.shadowOffsetX = randomNum(-3, 3);
      ctx.shadowOffsetY = randomNum(-3, 3);
      ctx.shadowBlur = randomNum(-3, 3);
      ctx.shadowColor = "rgba(0, 0, 0, 0.3)";
      var x = (this.options.width / 5) * i;
      var y = this.options.height / 2;
      var deg = randomNum(-30, 30);
      /** 设置旋转角度和坐标原点**/
      ctx.translate(x, y);
      ctx.rotate((deg * Math.PI) / 180);
      ctx.fillText(txt, 0, 0);
      /** 恢复旋转角度和坐标原点**/
      ctx.rotate((-deg * Math.PI) / 180);
      ctx.translate(-x, -y);
    }
    /** 绘制干扰线**/
    for (var i = 0; i < 4; i++) {
      ctx.strokeStyle = randomColor(40, 180);
      ctx.beginPath();
      ctx.moveTo(
        randomNum(0, this.options.width),
        randomNum(0, this.options.height)
      );
      ctx.lineTo(
        randomNum(0, this.options.width),
        randomNum(0, this.options.height)
      );
      ctx.stroke();
    }
    /** 绘制干扰点**/
    for (var i = 0; i < this.options.width / 4; i++) {
      ctx.fillStyle = randomColor(0, 255);
      ctx.beginPath();
      ctx.arc(
        randomNum(0, this.options.width),
        randomNum(0, this.options.height),
        1,
        0,
        2 * Math.PI
      );
      ctx.fill();
    }
  },
 
  /** 验证验证码**/
  validate: function (code) {
    var code = code.toLowerCase();
    var v_code = this.options.code.toLowerCase();
    if (code == v_code) {
      return true;
    } else {
      return false;
    }
  },
};
/** 生成字母数组**/
function getAllLetter() {
  var letterStr =
    "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";
  return letterStr.split(",");
}
/** 生成一个随机数**/
function randomNum(min, max) {
  return Math.floor(Math.random() * (max - min) + min);
}
/** 生成一个随机色**/
function randomColor(min, max) {
  var r = randomNum(min, max);
  var g = randomNum(min, max);
  var b = randomNum(min, max);
  return "rgb(" + r + "," + g + "," + b + ")";
}
 
export { GVerify };

  

可以手动修改内容类型、长度等等,支持手动刷新

 

使用方式:

1.组件中自行配置样式:

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<div :class="$style.verifyBox" v-show="verifyVisible">
            <input
              type="text"
              maxlength="4"
              :class="[$style.verifyInput]"
              v-model="userCode"
            />
            <div id="v_container" @click="btncode"></div>
            <button @click="xxxxVerifyCode">提交</button>
          </div>

  

2.引入文件:

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import { GVerify } from "@/utils/GVerify.js";
 
 
  data() {
    return {
      verifyCode: "",
      imgData: "", // 验证码
      userCode: "", // 用户填写的动态验证码
    };
  },

  

3.methods中配置刷新与校验的方法:

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// 获取动态验证码
    btncode() {
      this.imgData = this.verifyCode.options.code.substr(
        this.verifyCode.options.code.length - 4
      );
    },
    // 校验动态验证码
    xxxxVerifyCode() {
      var userCode = this.userCode.toLowerCase();
      var v_code = this.verifyCode.options.code.substr(this.verifyCode.options.code.length - 4).toLowerCase();      if(userCode === v_code){
        alert('duile')
      }
    },

  

4.mounted或逻辑中调用:

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this.verifyCode = new GVerify("v_container");
          this.imgData = this.verifyCode.options.code.substr(this.verifyCode.options.code.length - 4)<em id="__mceDel">;</em><em id="__mceDel">          this.verifyVisible = true;
</em>

  

效果:

 

 

方案2:使用插件vue2-verify

 

参考文档(随便找的,网上很多大佬分享):https://blog.csdn.net/q2724338648/article/details/134488798

 

此插件提供了5种验证码样式,有最常见的图形验证码,还有滑动验证码、拼图验证码、计算验证码、填块验证码,样式可以自行覆盖,封装较完善

效果:

 

使用方法:

【这里用了普通条形验证码,其余4种文档中有列出参数】

 

1.npm引入插件:

npm i vue2-verify

 

2.组件中调用:

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<verify
                @success="onVerifySuccess"
                @error="onVerifyError"
                :type="1"
                :codeLength="4"
              ></verify>

  

3.文件中引入:

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import Verify from "vue2-verify";  data() {
    return {
      verifyVisible: false,
    };
  },components: { Verify, },

  

4.methoed中配置校验方法即可:

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onVerifySuccess(obj) {
  //验证码正确回调
  setTimeout(() => {
    this.verifyVisible = false;
    this.onClick(this.verifyCode);
  }, 300);
},
onVerifyError(obj) {
  //验证码错误回调
  console.log("verify error");
  //错误刷新验证码
  obj.refresh();
},

  

p.s.不过滑块验证体验稍微有些不好,遂放弃使用

 

posted @   芝麻小仙女  阅读(1019)  评论(0编辑  收藏  举报
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