关于前端:uniapp-仿抖音小程序组件超高性能预加载

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全局仅渲染 3 个 swiper-item
实测，不论加载多少数据也能丝滑滚动
实用于 vue3，vue2 请自行修
主动预加载视频
首次渲染优化

https://ext.dcloud.net.cn/plugin?id=13025

装置 nodejs: https://nodejs.org/en/
装置依赖: npm i
运行我的项目: npm run dev:mp-weixin
构建我的项目资源: npm run build:mp-weixin
关上小程序开发工具导入dist/dev/mp-weixin 即可

属性	类型	阐明
videoList	Array	视频列表，数组对象 `{src: string, poster?: string, objectFit: string}`
loop	Boolean	是否循环播放视频
controls	Boolean	显示原生管制栏
autoplay	Boolean	是否自动播放
autoChange	Boolean	是否主动滚动播放
loadMoreOffsetCount	Boolean	滚动加载阈值（即播放到残余多少个之后触发加载更多
@play	EventHandle	当开始 / 持续播放时触发 play 事件
@error	EventHandle	视频播放出错时触发
@ended	EventHandle	当播放到开端时触发 ended 事件
@loadMore	EventHandle	当滚动到最初第 N 条数据后，须要加载更多时触发
@change	EventHandle	切换视频时触发
@click	EventHandle	点击整个视频区域触发
@controlstoggle	EventHandle	管制栏状态变动触发

属性	默认值	阐明
default	–	自定义内容，笼罩到视频上方的所有自定义内容 v-slot=”data” 为以后渲染数据，请参照应用示例


<template>
  <div class="video-container">
    <mTikTok
      ref="mTikTokRef"
      :video-list="state.videoList"
      @loadMore="loadMore"
      @change="change"
    >
      <!-- 此处为用户齐全自定义 data 中的数据为以后渲染的数据 -->
      <template v-slot="data">
        <view class="video-layer"> 第 {{data.item.id}} 个 </view>
      </template>
    </mTikTok>
  </div>
</template>
<script lang="ts" setup>
import {onMounted, reactive, ref} from "vue";
// 导入组件
import mTikTok from "@/components/mTikTok.vue";

const mTikTokRef = ref<InstanceType<typeof mTikTok>>();

const state = reactive({
  videoList: [
    {
      src: "https://xjc.demo.hongcd.com/uploads/20230214/84e165388f5bfdb1550522f50f5a57bb.mp4",
      id: "1",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20230214/3f26d950ac286eecedba49f5295f0819.mp4",
      id: "2",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20230215/8b5ac0420fe61e2f9660d7b8af998f7b.mp4",
      id: "3",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20210128/d932b2d78cebb0a8cb8f9a6216790dfb.mp4",
      id: "4",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20210128/0c64cbeea28b10c06eee8728c762449e.mp4",
      id: "5",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20210327/1b72e1b6153cd29df07f5449991e8083.mp4",
      id: "6",
    },
    {
      src: "https://xjc.demo.hongcd.com/uploads/20230214/7e1a0baaebc4e656bbbfbc44d7a55a60.mp4",
      id: "7",
    },
  ],
});

const loadMore = () => {
  // 触发加载更多
  console.log("加载更多");
};

const change = (e: any) => {console.log("🚀 ~ file: index.vue:53 ~ change ~ data:", e);
};

// 播放第几个
const playIndex = (index: number) => {mTikTokRef.value?.initSwiperData(index);
};

onMounted(() => {
  // 间接播放第 3 个
  playIndex(3);
});
</script>
<style lang="scss">
.video-layer {
  position: absolute;
  right: 12px;
  bottom: 120px;
  color: #fff;
}
</style>

正文完