luffy前端主页搭建

子组件

页头组件components / Header.vue

<template>
    <div class="header">
        <div class="slogan">
            <p>老男孩IT教育 | 帮助有志向的年轻人通过努力学习获得体面的工作和生活</p>
        </div>
        <div class="nav">
            <ul class="left-part">
                <li class="logo">
                    <router-link to="/">
                        <img src="../assets/img/head-logo.svg" alt="">
                    </router-link>
                </li>
                <li class="ele">
                    <span @click="goPage('/free-course')" :class="{active: url_path === '/free-course'}">免费课</span>
                </li>
                <li class="ele">
                    <span @click="goPage('/actual-course')" :class="{active: url_path === '/actual-course'}">实战课</span>
                </li>
                <li class="ele">
                    <span @click="goPage('/light-course')" :class="{active: url_path === '/light-course'}">轻课</span>
                </li>
            </ul>

            <div class="right-part">
                <div>
                    <span>登录</span>
                    <span class="line">|</span>
                    <span>注册</span>
                </div>
      </div>
        </div>
    </div>

</template>

<script>

    export default {
        name: "Header",
        data() {
            return {
                // 当前所在路径，去sessionStorage取的，如果取不到，就是 /
                url_path: sessionStorage.url_path || '/',
            }
        },
        methods: {
            goPage(url_path) {
                // 已经是当前路由就没有必要重新跳转
                if (this.url_path !== url_path) {
                    this.$router.push(url_path);
                }
                sessionStorage.url_path = url_path;
            },
        },
        created() {
            // 组件加载成功，就取出当前的路径，存到sessionStorage  this.$route.path
            sessionStorage.url_path = this.$route.path;
            // 把url_path = 当前路径
            this.url_path = this.$route.path;
        }
    }
</script>

<style scoped>
    .header {
        background-color: white;
        box-shadow: 0 0 5px 0 #aaa;
    }

    .header:after {
        content: "";
        display: block;
        clear: both;
    }

    .slogan {
        background-color: #eee;
        height: 40px;
    }

    .slogan p {
        width: 1200px;
        margin: 0 auto;
        color: #aaa;
        font-size: 13px;
        line-height: 40px;
    }

    .nav {
        background-color: white;
        user-select: none;
        width: 1200px;
        margin: 0 auto;

    }

    .nav ul {
        padding: 15px 0;
        float: left;
    }

    .nav ul:after {
        clear: both;
        content: '';
        display: block;
    }

    .nav ul li {
        float: left;
    }

    .logo {
        margin-right: 20px;
    }

    .ele {
        margin: 0 20px;
    }

    .ele span {
        display: block;
        font: 15px/36px '微软雅黑';
        border-bottom: 2px solid transparent;
        cursor: pointer;
    }

    .ele span:hover {
        border-bottom-color: orange;
    }

    .ele span.active {
        color: orange;
        border-bottom-color: orange;
    }

    .right-part {
        float: right;
    }

    .right-part .line {
        margin: 0 10px;
    }

    .right-part span {
        line-height: 68px;
        cursor: pointer;
    }
</style>

轮播图组件Banner.vue

<template>
  <div class="banner">
      <el-carousel :interval="5000" arrow="always">
        <el-carousel-item v-for="item in img_list" :key="item.id">
          <div v-if="item.link.indexOf('http')>-1">
            <a :href="item.link">
              <img :src="item.image" :alt="item.title">
            </a>
          </div>
          <div v-else>
            <router-link :to="item.link">
              <img :src="item.image" :alt="item.title">
            </router-link>

          </div>
        </el-carousel-item>
      </el-carousel>
    </div>
</template>


<script>
  export default {
    name:'Banner',
    data(){
      return{
        img_list:[]
      }
    },
    created() {
      this.$axios.get(this.$settings.BASE_URL+'/home/banner/').then(res=>{
        console.log(res.data)
        if(res.data.code==100){
          this.img_list = res.data.result
        }else {
          this.$message(res.data.msg)
        }
      }).catch(res=>{
        this.$message('轮播图服务器异常，请稍后再试')
      })
    }
  }
</script>



<style scoped>
.el-carousel__item {
  height: 400px;
  min-width: 1200px;
}

.el-carousel__item img {
  height: 400px;
  margin-left: calc(50% - 1920px / 2);
}
</style>

页脚组件：components/Footer.vue

<template>
    <div class="footer">
        <ul>
            <li>关于我们</li>
            <li>联系我们</li>
            <li>商务合作</li>
            <li>帮助中心</li>
            <li>意见反馈</li>
            <li>新手指南</li>
        </ul>
        <p>Copyright © luffycity.com版权所有 | 京ICP备17072161号-1</p>
    </div>
</template>

<script>
    export default {
        name: "Footer"
    }
</script>

<style scoped>
    .footer {
        width: 100%;
        height: 128px;
        background: #25292e;
        color: #fff;
    }

    .footer ul {
        margin: 0 auto 16px;
        padding-top: 38px;
        width: 810px;
    }

    .footer ul li {
        float: left;
        width: 112px;
        margin: 0 10px;
        text-align: center;
        font-size: 14px;
    }

    .footer ul::after {
        content: "";
        display: block;
        clear: both;
    }

    .footer p {
        text-align: center;
        font-size: 12px;
    }
</style>

父组件

主页组件：views/Home.vue

<template>
  <div class="home">
    <!--引入Header组件和Banner组件-->
    <Header></Header>
    <Banner></Banner>
    <!--填充页面组件-->
     <div class="course">
      <el-row>
        <el-col :span="6" v-for="(o, index) in 8" :key="o" class="course_detail">
          <el-card :body-style="{ padding: '0px' }">
            <img src="http://photo.liuqingzheng.top/2023%2002%2022%2021%2057%2011%20/image-20230222215707795.png"
                 class="image">
            <div style="padding: 14px;">
              <span>推荐课程</span>
              <div class="bottom clearfix">
                <time class="time">价格：999</time>
                <el-button type="text" class="button">查看详情</el-button>
              </div>
            </div>
          </el-card>
        </el-col>
      </el-row>
    </div>
    <!--引入页脚组件-->
    <Footer></Footer>
  </div>
</template>



<script>
import Header from "@/components/Header";
import Footer from "@/components/Footer";
import Banner from "@/components/Banner";

export default {
  name: 'HomeView',
  components:{
    Header,
    Banner,
    Footer,
  }
}
</script>



<style scoped>
.time {
  font-size: 13px;
  color: #999;
}

.bottom {
  margin-top: 13px;
  line-height: 12px;
}

.button {
  padding: 0;
  float: right;
}

.image {
  width: 100%;
  display: block;
}

.clearfix:before,
.clearfix:after {
  display: table;
  content: "";
}

.clearfix:after {
  clear: both
}

.course_detail {
  padding: 50px;
}
</style>

 

要注意的问题

1. rooter-link只能做内部跳转，如果要跳转到外部链接，需要用a标签

<div v-if="item.link.indexOf('http')>-1">
      <a :href="item.link">
          <img :src="item.image" :alt="item.title">
      </a>
</div>

<div v-else>
      <router-link :to="item.link">
          <img :src="item.image" :alt="item.title">
      </router-link>
 </div>

2. vue中的.then()与.catch()

.then()

在axios请求完成后执行的下一步操作（异步执行），包括两个参数

axios.post(url, data)
   .then(res => {
      console.log(res);//第一个参数：成功后返回结果
   }, error => {
      console.log(error);//第二个参数：请求失败后返回值
   })

.catch()

在.then()中代码逻辑出错、请求失败等的回调函数，防止因代码造成程序崩溃，这里的方法类似于try{}.catch(e){}，省略了try{}

 axios.post(url, data)
    .then(data => {
        console.log(data)
    })
    .catch(err => {
        console.log(err)//代码错误、请求失败捕获
    })

总结

catch中获取到的值是请求失败或者代码问题造成的错误，而因代码造成的错误在.then()中获取不到，因此我们常用catch
我们偶尔会遇到一些问题：明明请求成功了，逻辑却进入catch中了，这时说明在then中的处理逻辑可能出现了错误，并不是请求失败才会进入catch。