个人学习 模拟接口登录+本地验证码

验证码组件Sidentify.vue

<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: 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) {
      var r = this.randomNum(min, max)
      var g = this.randomNum(min, max)
      var b = this.randomNum(min, max)
      return 'rgb(' + r + ',' + g + ',' + b + ')'
    },
    drawPic() {
      var canvas = document.getElementById('s-canvas')
      var 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'
      var x = (i + 1) * (this.contentWidth / (this.identifyCode.length + 1))
      var 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>

login.vue

<template>
  <div class="bgimage">
    <div class="login">
      <el-form
        ref="loginForm"
        :rules="loginRules"
        :label-position="labelPosition"
        label-width="80px"
        :model="userinfo"
      >
        <div class="account1">
          <el-form-item label="账号">
            <div class="inputaccount">
              <el-input v-model="userinfo.account" id="input1"></el-input>
            </div>
          </el-form-item>
        </div>
        <div class="password1">
          <el-form-item label="密码">
            <div class="inputpassword">
              <el-input
                el-input
                type="password"
                v-model="userinfo.password"
                id="input2"
              ></el-input>
            </div>
          </el-form-item>
        </div>
        <div class="inputvc">
          <el-form-item label="验证码" prop="verifycode">
            <!-- 注意：prop与input绑定的值一定要一致，否则验证规则中的value会报undefined，因为value即为绑定的input输入值 -->
            <el-input
              v-model="userinfo.verifycode"
              placeholder="请输入验证码"
              class="identifyinput"
            ></el-input>
          </el-form-item>
        </div>
        <el-form-item>
          <div class="identifybox">
            <div @click="refreshCode">
              <s-identify :identifyCode="identifyCode"></s-identify>
            </div>
            <el-button @click="refreshCode" type="text" class="textbtn"
              >看不清，换一张</el-button
            >
          </div>
        </el-form-item>
        <el-form-item>
          <div class="loginbtn">
            <el-button size="small" type="primary" @click.native.prevent="test"
              >登录</el-button
            >
          </div>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
import SIdentify from "../components/SIdentify.vue";
export default {
  data() {
    const validateVerifycode = (rule, value, callback) => {
      if (value === "") {
        callback(new Error("请输入验证码"));
      } else if (value !== this.identifyCode) {
        console.log("validateVerifycode:", value);
        callback(new Error("验证码不正确!"));
      } else {
        callback();
      }
    };
    return {
      labelPosition: "right",
      userinfo: {
        account: "无需填写",
        password: "123456",
        verifycode: "",
      },
      identifyCodes: "1234567890",
      identifyCode: "",
      loginRules: {
        // 绑定在form表单中的验证规则
        verifycode: [
          { required: true, trigger: "blur", validator: validateVerifycode },
        ],
      },
    };
  },
  components: {
    SIdentify,
  },
  mounted() {
    // 验证码初始化
    this.identifyCode = "";
    this.makeCode(this.identifyCodes, 4);
  },
  methods: {
    test() {
      let test = this;
      test.$ajax
        .post("https://xutailai.usemock.com/user/userinfo")
        .then(function (res) {
          console.log(res.data);
          test.$refs.loginForm.validate((valid) => {
            if (valid) {
              test.$message.success("登录成功");
              test.$router.replace("/management");
            }
          });
        })
        .catch(function (res) {
          console.log(res);
          test.$message.error(res.message + "接口请求失败");
        });
    },

    // 生成随机数
    randomNum(min, max) {
      return Math.floor(Math.random() * (max - min) + min);
    },
    // 切换验证码
    refreshCode() {
      this.identifyCode = "";
      this.makeCode(this.identifyCodes, 4);
    },
    // 生成四位随机验证码
    makeCode(o, l) {
      for (let i = 0; i < l; i++) {
        this.identifyCode +=
          this.identifyCodes[this.randomNum(0, this.identifyCodes.length)];
      }
      console.log(this.identifyCode);
    },
  },
};
</script>

<style >
.bgimage {
  top: 0;
  left: 0;
  position: absolute;
  width: 100%;
  height: 100%;
  background-image: url(../images/userlogin.jpg);
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}
.login {
  position: relative;
  padding: 0;
  left: 425px;
  top: 100px;
  width: 400px;
  height: 300px;
  box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
  border-radius: 4px;
  background-color: white;
  opacity: 0.9;
}
.account1 {
  text-align: center;
  padding-top: 50px;
  padding-left: 40px;
}
.password1 {
  padding-left: 40px;
}
.inputaccount {
  width: 200px;
}
.inputpassword {
  width: 200px;
}
.inputvc {
  margin-left: 40px;
  width: 200px;
}
.loginbtn {
  margin-left: 80px;
  margin-top: -20px;
}
.identifybox {
  position: absolute;
  margin-left: 200px;
  display: flex;
  justify-content: space-between;
  margin-top: -62px;
  margin-right: 100px;
  margin-left: 180px;
}
.textbtn {
  position: absolute;
  margin-top: 30px;
}
</style>