Vue3.0 实现登录界面验证码效果（验证码图形插件GVerify）

Vue3.0 实现登录界面验证码效果（验证码图形插件GVerify）

七月_Mo

5296人浏览 · 2023-01-12 13:15:42

七月_Mo · 2023-01-12 13:15:42 发布

要求：
1.当密码、验证码输入错误是，验证码会自动更新
2. 点击更新验证码

实现方式：

1.定义一个字母数组

/** 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(',');
}

2.生成随机数

function randomNum(min, max) {
  return Math.floor(Math.random() * (max - min) + min);
}

3.生成随机色

function randomColor(min, max) {
  var r = randomNum(min, max);
  var g = randomNum(min, max);
  var b = randomNum(min, max);

  return 'rgb(' + r + ',' + g + ',' + b + ')';
}

核心代码（验证码图形插件GVerify–插件代码）

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: '174', // 默认canvas宽度
    height: '68', // 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: '',
    con: null,
  };

  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,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'.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 con = this.options.con;
    var canvas = document.createElement('canvas');

    this.options.width = con.offsetWidth > 0 ? con.offsetWidth : this.options.width;
    this.options.height = con.offsetHeight > 0 ? con.offsetHeight : this.options.height;
    canvas.id = this.options.canvasId;
    canvas.width = this.options.width;
    canvas.height = this.options.height;
    canvas.style.cursor = 'pointer';
    canvas.innerHTML = '您的浏览器版本不支持canvas';
    con.appendChild(canvas);
  },

  /** 生成验证码* */
  refresh: function () {
    this.options.code = '';

    var canvas = document.getElementById(this.options.canvasId);

    if (canvas.getContext) {
      var ctx = canvas.getContext('2d');
    } else {
      return;
    }

    ctx.textBaseline = 'middle';

    ctx.fillStyle = randomColor(180, 240);
    ctx.fillRect(0, 0, this.options.width, this.options.height);

    let txtArr;

    if (this.options.type == 'blend') {
      // 判断验证码类型
      txtArr = this.options.numArr.concat(this.options.letterArr);
    } else if (this.options.type == 'number') {
      txtArr = this.options.numArr;
    } else {
      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 (let 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 (let 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();
    }
  },

  /** 获取验证码* */
  GetCode: function () {
    return this.options.code;
  },
  /** 验证验证码* */
  validate: function (code) {
    var code1 = code.toLowerCase();
    var v_code = this.options.code.toLowerCase();

    if (code1 == v_code) {
      return true;
    } else {
      return false;
    }
  },
};

5.将以上（1、 2、 3、 4、）合并成一个js文件放到项目中便于调用

6.登录界面（template 部分）

<template>
  <div class="root">
    <div class="root_center">
      <div style="width: 626px; height: 880px">
        <div class="root_center_left" />
      </div>
      <div style="width: 854px; height: 880px">
        <div class="root_center_right">
          <p>
            <img src="../../assets/image/login/组4793.png" />
          </p>
          <p class="font_size_style">*****信息管理系统</p>
          <el-form ref="loginFormRef" :model="loginFormState" :rules="rules">
            <el-form-item prop="account">
              <span class="root_title" :style="root_name"> 账号： </span>
              <el-input
                v-model.trim="account"
                class="root_input"
                size="large"
                type="user"
                placeholder="请输入账号"
                maxlength="11"
                autocomplete="new-password"
                :prefix-icon="User"
                @focus="handleFocus('user')"
                @blur="handleBlur('user')"
                @keyup.enter.exact="handleLogin"
              >
              </el-input>
            </el-form-item>

            <el-form-item prop="password">
              <span class="root_title" :style="root_pwa"> 密码： </span>
              <el-input
                v-model.trim="password"
                class="root_input"
                size="large"
                type="password"
                placeholder="请输入密码"
                maxlength="12"
                clearable
                autocomplete="new-password"
                :prefix-icon="Lock"
                @focus="handleFocus('password')"
                @blur="handleBlur('password')"
                @keyup.enter.exact="handleLogin"
              ></el-input>
            </el-form-item>
            <el-form-item prop="code">
              <span class="root_title" :style="root_pwa_code"> 验证码: </span>
              <el-input
                v-model.trim="code"
                class="root_input_code"
                size="large"
                placeholder="请输入验证码"
                :prefix-icon="Lock"
                maxlength="4"
                @focus="handleFocus('code')"
                @blur="handleBlur('code')"
                @keyup.enter.exact="handleLogin"
              >
                <template #append>
                  <div class="yzcode" :style="{ width: width + 'px', height: height + 'px' }" @click="OnRefresh()">
                    <p ref="picyzm"></p>
                  </div>
                </template>
              </el-input>
            </el-form-item>

            <br />

            <el-form-item size="medium">
              <el-button
                v-debounce="2000"
                class="root_but"
                type="primary"
                :loading="loginFormState.loading"
                @click="handleLogin"
                >登录</el-button
              >
            </el-form-item>
          </el-form>
        </div>
      </div>
    </div>
  </div>
</template>

7.登录界面（js 部分）

<script setup>
import { ElInput, ElButton, ElForm, ElFormItem, ElLoading, ElMessage } from 'element-plus';
import { ref, reactive, toRefs, onMounted } from 'vue';
import { Lock, User } from '@element-plus/icons-vue';
import GVerify from './piccode.js';
import { encrypt } from '../../common/common-crypto';
import { getMenuInfoByUserIdForMap, getPersonalInformation, userLoginApi } from '../../apis/api_user';
import { KEY_TOKEN } from '../../apis';
import { useRouter } from 'vue-router';
import { useUserStore } from '../../stores/storeOther';
import { useMapStore } from '../../stores/map';

const props = defineProps({
  width: {
    type: Number,
    default: 200,
  },
  height: {
    type: Number,
    default: 60,
  },
});

let verifyCode = null;
const router = useRouter();
const $userStore = useUserStore();
const $mapStore = useMapStore();

const loginFormRef = ref();
const picyzm = ref(null);

const loginFormState = reactive({
  account: '',
  password: '',
  loading: false,
  code: '',
});
const { account, password, code } = toRefs(loginFormState);

const code_content = ref('');
const root_pwa = ref('color: #333333');
const root_name = ref('color: #333333');
const root_pwa_code = ref('color: #333333');

const rules = {
  account: [{ required: true, message: '账号不能为空', trigger: 'blur' }],
  password: [{ required: true, message: '密码不能为空', trigger: 'blur' }],
  code: [{ required: true, message: '请输入验证码', trigger: 'blur' }],
};

// 当有焦点时候触发
const handleFocus = (isName) => {
  if (isName == 'user') {
    root_name.value = 'color: #009cf9';
  } else if (isName == 'password') {
    root_pwa.value = 'color: #009cf9';
  } else {
    root_pwa_code.value = 'color: #009cf9';
  }
};

// 失去焦点触发
const handleBlur = (isName) => {
  if (isName == 'user') {
    root_name.value = 'color:  #333333';
  } else if (isName == 'password') {
    root_pwa.value = 'color:  #333333';
  } else {
    root_pwa_code.value = 'color:  #333333';
  }
};

//刷新验证码
const OnRefresh = () => {
  verifyCode.refresh();

  const code = verifyCode.GetCode();

  code_content.value = code;
};

onMounted(() => {
  picyzm.value && picyzm.value.focus();
  //初始化验证码
  verifyCode = new GVerify({
    type: 'blend',
    height: props.height,
    con: picyzm.value,
  });

  //获取验证码内容
  const code = verifyCode.GetCode();

  code_content.value = code;
});

/**
 * @description:登录
 * @param {*}
 * @return {*}
 */
const handleLogin = () => {
  loginFormRef.value.validate(async (valid) => {
    if (valid) {
      const loading = ElLoading.service({
        lock: true,
        text: '正在加载中...',
        background: 'rgba(0, 0, 0, 0.7)',
      });

      if (code_content.value.toLowerCase() !== loginFormState.code.toLowerCase()) {
        ElMessage({
          type: 'warning',
          message: '验证码输入不正确',
        });
        loading.close();
        verifyCode.refresh();

        const code = verifyCode.GetCode();

        code_content.value = code;

        return;
      }

      const random_start = PassWordRandom(7);
      const random_end = PassWordRandom(7);

      const password_value = encrypt(`${random_start}${loginFormState.password}${random_end}`);

      const [err, data] = await userLoginApi({
        username: loginFormState.account,
        password: password_value,
      });

      if (!err) {
        const { authorization } = data.data;

        sessionStorage.setItem(KEY_TOKEN, authorization);

        const [userErr, userInfo] = await getPersonalInformation();

        if (userErr) {
          ElMessage({
            type: 'error',
            message: '获取用户信息失败',
          });

          location.reload();
          router.replace('/login');

          return;
        }

        $userStore.SET_USER_INFO(userInfo.data);
        $mapStore.SELECT_SUPERIOR_INDIVIDUAL_MAP();
        $mapStore.SELECT_SUPERIOR_STAND_MAP();
        $mapStore.SELECT_MAP_LAYER_ALL();

        const [errMenuInfo, MenuInfo] = await getMenuInfoByUserIdForMap();

        if (!errMenuInfo) {
          $userStore.OBTAIN_BUSINESS_MAP(MenuInfo.data);
        }

        // !获取用户 信息
        router.replace('/plant');
        setTimeout(() => {
          loading.close();
          ElMessage({
            type: 'success',
            message: '登录成功',
          });
        }, 5000);
      } else {
        ElMessage.error(err);
        loading.close();
        verifyCode.refresh();

        const code = verifyCode.GetCode();

        code_content.value = code;

        return;
      }
    }
  });
};

const PassWordRandom = (count) => {
  const str = '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,0,1,2,3,4,5,6,7,8,9';
  const arr = str.split(',');
  let rand = '';

  for (var i = 0; i < count; i++) {
    rand += arr[Math.floor(Math.random() * 36)];
  }

  return rand;
};

8.登录界面（css 部分）

<style scoped lang="scss">
.root {
  width: 100%;
  height: 100%;
  background-image: url('../../assets/image/login/login1.png');
  background-size: 100% 100%;
  opacity: 0.999;
  user-select: none;
  display: flex;
  box-sizing: border-box;
  justify-content: center;
  align-items: center;

  .root_center {
    width: 1480px;
    height: 880px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0px 10px 20px 0px rgba(0, 0, 0, 0.16);
    display: flex;
    justify-content: center;
    align-items: center;
    .el-row {
      height: 100%;
      .el-col {
        height: 100%;
      }
    }
    .root_center_left {
      width: 100%;
      height: 100%;
      background-color: rgba(255, 255, 255, 0.6);
      background-image: url('../../assets/image/login/login2.png');
      background-size: 100% 100%;
    }
    .root_center_right {
      width: 100%;
      height: 100%;
      background-color: rgba(255, 255, 255, 0.6);
      text-align: center;
      box-sizing: border-box;
      padding: 25px 39px 104px 34px;
      display: flex;
      flex-direction: column;
      overflow: hidden;
      .font_size_style {
        font-size: 30px;
        font-weight: 700;
        color: #009cf9;
        margin-bottom: 54px;
        margin-top: 0;
      }
      .root_title {
        // font-size: 20px;
        font-size: 18px;
        margin-bottom: 5px;
      }

      .root_input_code {
        font-size: 20px;
        p {
          margin: 0 !important;
        }
        :deep(input) {
          height: 74px !important;
          border-radius: 5px;
          font-size: 18px;
        }
        :deep(.el-input__wrapper) {
          border-top-left-radius: 5px;
          border-bottom-left-radius: 5px;
          border-right-style: none;
          box-shadow: none;
        }
      }
      .root_input {
        font-size: 18px;

        :deep(input) {
          height: 74px !important;
          border-radius: 5px;
          font-size: 20px;
        }
        :deep(.el-input__wrapper) {
          border-radius: 5px;
          border: 1px solid #dcdee5;
        }
      }
      .root_but {
        width: 100%;
        height: 73px;
        box-shadow: 0px 10px 20px 5px rgba(70, 113, 215, 0.3);
        background-color: #009cf9;
        font-size: 20px;
        border-radius: 10px;
        margin-top: 30px;
      }
    }
  }

  #picyzm {
    height: 40px;
    display: inline-block;
    margin: 0 30px;
  }
  #verifyCodeDemo {
    width: 100%;
    display: flex;
    margin-top: 200px;
    justify-content: center;
  }
  #btn {
    margin: 30px auto;
    background-color: blue;
    color: #fff;
    border-radius: 5px;
    border: 0;
    width: 100px;
    height: 40px;
  }
}
.el-form-item:not(:last-child) {
  display: block;
  margin-bottom: 37px;
  text-align: left;
}
.el-form-item:last-child {
  margin-bottom: 0px !important;
}
:deep(.el-input-group__append) {
  border-left-style: none;
  background: #ffffff !important;
  border-top-right-radius: 5px;
  border-bottom-right-radius: 5px;
  padding: 0;
}

:deep(.el-form-item__error) {
  font-weight: 600;
  padding-top: 6px;
  font-size: 12px;
}
</style>

9.最终效果

20230112_111105

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