vue 实现滚动到页面底部开始加载更多

快来打我* 2021-12-17 08:47 701阅读 0赞

直接上代码：

<template>
      <div class="newsList">
        <div v-for="(items, index) in newsList">
          <div class="date">{
        {showDay(index)}}</div>
          <div class="list" >
            <ul>
              <li class="list-item" v-for="item in items">
                <span class="text">{
        {item.title}}</span>
                <img :src="attachImageUrl(item.images[0])" class="image"/>
              </li>
            </ul>
          </div>
        </div>
        <div class="infinite-scroll" v-show="loading">
          <svg class="loader-circular" viewBox="25 25 50 50">
            <circle class="loader-path" cx="50" cy="50" r="20" fill="none" stroke="rgb(53, 157, 218)" stroke-width="5"></circle>
          </svg>
          <span class="infinite-scroll-text">{
        {tips}}</span>
        </div>
      </div>
    </template>
    
    <script>
      import axios from 'axios';
    
      export default {
        data () {
          return {
            newsList: [],
            date: [],
            todayDate: '',
            REQUIRE: true,
            loading: false,
            tips: '努力加载中...'
          }
        },
        created () {
          // 获取今日新闻
          axios.get('http://zhihuapi.herokuapp.com/api/4/news/latest')
            .then( (res) => {
            this.newsList.push(res.data['stories'])
            this.date.push(res.data['date']);
            this.todayDate = res.data['date']
          })
        },
        mounted () {
          // 添加滚动事件，检测滚动到页面底部
          window.addEventListener('scroll', this.scrollBottom)
        },
        methods: {
          scrollBottom() {
            // 滚动到页面底部时，请求前一天的文章内容
            if (((window.screen.height + document.body.scrollTop) > (document.body.clientHeight)) && this.REQUIRE) {
              // 请求的数据未加载完成时，滚动到底部不再请求前一天的数据
              this.REQUIRE = false;
              this.loading = true;
              this.tips = '努力加载中...';
              axios.get('http://zhihuapi.herokuapp.com/api/4/news/before/' + this.todayDate).then((res) => {
                this.newsList.push(res.data['stories']);
              this.date.push(res.data['date']);
              this.todayDate = res.data['date'];
              // 请求的数据加载完成后，再次滚动到底部时，允许请求前一天数据
              this.$nextTick(() => {
                this.REQUIRE = true;
                this.loading = false;
              });
            }).catch(() => {
                this.tips = '连接失败，请稍后重试';
              // 请求失败时，将 REQUIRE 置为 true，滚动到底部时，再次请求
              this.REQUIRE = true;
            });
            }
          },
          showDay (index) {
            if (index === 0) {
              return '今日新闻'
            } else {
              return this.getToday(index)
            }
          },
          getToday (index) {
            let year = this.date[index].slice(0, 4);
            let month = this.date[index].slice(4, 6);
            let day = this.date[index].slice(6);
            let today = new Date(year + '/' + month + '/' + day);
            let week = ['日', '一', '二', '三', '四', '五', '六'];
            return month + '月' + day + '日' + ' 星期' + week[today.getDay()];
          },
          attachImageUrl (srcUrl) {
            if (srcUrl !== undefined) {
              return 'http://read.html5.qq.com/image?src=forum&q=5&r=0&imgflag=7&imageUrl=' + srcUrl.slice(0, 4) + srcUrl.slice(5);
            }
          }
        }
      }
    </script>

转载于:https://www.cnblogs.com/guoliping/p/11112577.html