一、内容描述

        页面有俩块内容，分别是验证码登录页面内容，账号密码登录页面内容。有俩种处理方式，一个是写俩个页面跳转使用，还有一种是一个页面俩个内容，切换的只是不同的内容，相同的内容保留。一般都是选择后者。

 二、基本思路

将标题以数组的方式循环渲染出来，这样我就可以拿到对应的index值，后面有用。

const loginitems = ref([
  {
    id: 1,
    text: "验证码",
  },
  {
    id: 2,
    text: "账号密码",
  },
]);

<div
            class="login-item"
            v-for="(item, index) in loginitems"
            :key="item.id"
            :class="current === index ? 'move' : ''"
            @click="change(index)"
          >
            {{ item.text }}
          </div>

用一个标识标记当前选中的是哪个，默认是第一个。

// 标识是哪个登录
const current = ref(0);

内容区域根据标识的值显示对应内容就行了！

选中样式使用动态绑定，判断当前的标记值current和index是否一样。 一样绑定上去，使用三元运算符判断就行了。

:class="current === index ? 'move' : ''"

.move {
  color: #f5b90f;
  padding-bottom: 5px;
  font-weight: 600;
  border-bottom: 2px solid #f5b90f;
}

点击某一项的时候，根据点击事件修改current的值。

// 切换验证码登录和账号密码登录
const change = (index) => {
  current.value = index;
};

不算很难，且容易理解！

三、完整示例代码

<template>
  <!-- 登录页面 -->
  <div class="container">
    <div class="main">
      <div class="head">
        <img src="../src/assets/static/image/demo.png" alt="" />
        <div class="title">智慧物业管理平台</div>
      </div>
      <!-- 登录内容区域 -->
      <div class="login">
        <div class="login-options">
          <div
            class="login-item"
            v-for="(item, index) in loginitems"
            :key="item.id"
            :class="current === index ? 'move' : ''"
            @click="change(index)"
          >
            {{ item.text }}
          </div>
        </div>
        <div class="con">
          <div class="con-item" v-if="current == 0">
            <div class="input-items">
              <input
                type="text"
                v-model="phonevalue"
                placeholder="输入手机号"
              />
            </div>
            <div class="input-items">
              <input type="text" v-model="codevalue" placeholder="输入验证码" />
              <div class="getcode" @click="getcode">
                <p v-if="isok == 1">获取验证码</p>
                <p v-else>{{ countTime }}</p>
              </div>
            </div>
            <div class="login-btn" @click="login">登录</div>
          </div>
          <div class="con-item" v-if="current == 1">
            <div class="input-items">
              <input
                type="text"
                v-model="phonevalue"
                placeholder="输入手机号"
              />
            </div>
            <el-input
              v-model="passwordinput"
              style="height: 41px; border: 0; outline: none"
              type="password"
              placeholder="输入密码"
              show-password
            />
            <div class="reset" @click="gotoforgetPassword">重置密码></div>
            <div class="login-btn" @click="login">登录</div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup>
import { useRouter, useRoute } from "vue-router";
// 登录方式
const loginitems = ref([
  {
    id: 1,
    text: "验证码",
  },
  {
    id: 2,
    text: "账号密码",
  },
]);
const countTime = ref(60);
const isok = ref(1);
const phonevalue = ref("");
const codevalue = ref("");
const passwordinput = ref("");

const router = useRouter();

// 获取验证码倒计时
const getcode = () => {
  isok.value = 0;
  var Timer = setInterval(() => {
    countTime.value--;
    if (countTime.value <= 0) {
      clearInterval(Timer);
      isok.value = 1;
      countTime.value = 60;
    }
  }, 1000);
};
// 标识是哪个登录
const current = ref(0);

// 切换验证码登录和账号密码登录
const change = (index) => {
  current.value = index;
};
// 忘记密码按钮
const gotoforgetPassword = () => {
  router.push({
    path: "/forgetPassword",
  });
};
// 登录进去首页
const login = () => {
  router.push({
    path: "/notice",
  });
};
</script>

<style scoped>
.container {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}
.main {
  display: flex;
  align-items: center;
  flex-direction: column;
}
.head {
  display: flex;
  align-items: center;
  flex-direction: column;
}
.head .title {
  font-size: 22px;
  font-weight: 600;
}
.head img {
  width: 300px;
  height: 200px;
}
.move {
  color: #f5b90f;
  padding-bottom: 5px;
  font-weight: 600;
  border-bottom: 2px solid #f5b90f;
}
.login-options {
  margin: 20px 0 10px 0;
  display: flex;
  align-items: center;
}
.login {
  width: 300px;
  display: flex;
  flex-direction: column;
}
.login-item {
  box-sizing: border-box;
  padding-bottom: 5px;
  margin-right: 10px;
}
.input-items {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #fff;
  border: 1px solid #ccc;
  border-radius: 5px;
  height: 40px;
  margin: 10px 0;
}
input {
  padding-left: 10px;
  outline: none;
  padding-right: 10px;
  border: 0;
  font-size: 14px;
}
.getcode {
  margin-right: 5px;
}
.con-item {
  position: relative;
}
.getcode p {
  width: 80px;
  height: 25px;
  text-align: center;
  background-color: #f5b90f;
  color: #fff;
  font-size: 12px;
  line-height: 25px;
  border-radius: 5px;
  cursor: pointer;
}
.login-btn {
  width: 100%;
  height: 30px;
  border-radius: 5px;
  text-align: center;
  line-height: 30px;
  color: #fff;
  margin: 45px 0;
  background-color: #f5b90f;
  cursor: pointer;
}
.reset {
  position: absolute;
  right: 0;
  color: #f5b90f;
  font-size: 12px;
  margin: 10px 0;
}
</style>