swiper-vertical-video.uvue

<template>
  <view class="page">
    <view style="padding: 10px;">
      <text>复用组件，无限滚动、加载、浏览视频的短视频模板</text>
      
      <text>【已知问题】swiper 组件竖滑动有 bug，先横向滑动</text>

      <view style="flex-direction: row;font-size: 10px;">
        <view>【状态】</view>
        <text v-for="(value,index) in state">
           第{{index+1}}个:{{value?'播放中':'已暂停'}}
        </text>
      </view>
    </view>
    <swiper class="swiper" :current="current" :circular="index != 0" :vertical="false" @change="onSwiperChange"
      @transition="onTransition">
      <swiper-item class="swiper-item" v-for="(item,i) in visibleList" :key="i">
        <video :ref="'video-'+i" class="video" :id="item._id" :src="item.src" :poster="item.src+'?x-oss-process=video/snapshot,t_1000,f_jpg'"
           :show-center-play-btn="false" :autoplay="false" :controls="false" :loop="true"
          @play="onPlay(i)" @pause="onPause(i)"
        ></video>
        <view class="video-top-view" @click="changeState(i)">
          <image v-if="!state[i]" class="play-btn" src="/static/template/swiper-vertical-video/play.png" mode="widthFix"></image>
        </view>
        <view>
          <text>第：{{i}}个容器，内容：{{item.content}}</text>
        </view>
      </swiper-item>
    </swiper>
  </view>
</template>
<script>
  import { VideoNode } from "uts.sdk.modules.DCloudUniVideo";
  type ListItem = { _id : string, content : string, src : string }
  let page : number = 0;
  
  export default {
    components:{},
    computed:{
      currentVideo():VideoNode{
        console.log('"video-"+this.current',"video-"+this.current);
        return this.$refs["video-"+this.current] as VideoNode
      }
    },
    data() {
      return {
        list: [] as ListItem[],
        visibleList: [] as ListItem[],// 提高性能 可见的只有3个
        current: 0 as number,
        index: 0,
        state:[false,false,false] as boolean[]
      }
    },
    beforeCreate() {
      this.list = this.getData()
      this.visibleList = this.list.slice(0, 3)
    },
    watch: {
      current(current : number, oldCurrent : number) {
        let changeNumber = current - oldCurrent
        if (changeNumber == 1 || changeNumber == -2) {
          // console.error('向右');
          this.index++
        } else {
          // console.error('向左');
          this.index--
        }
        // //翻页（3项为一页）
        if (Math.abs(changeNumber) == 2) {
          // console.log('翻页');
          page = Math.floor(this.index / 3);
          // console.log(this.index);
          // console.log('page',page);
          // console.log('slice',3*page,3*page+3);
          if (this.list.length < 3 * page + 3) {
            let list : ListItem[] = this.getData()
            this.list.push(...list.toTypedArray())
          }

          let visibleList = this.list.slice(3 * page, 3 * page + 3)
          // 换数据
          this.visibleList = visibleList
        }
      },
      current(current){
        this.state.forEach((val:boolean,index:number)=>{
          if(index === current){
            this.doPlay(current)
          }else if(val){
           // 除了选中的其他已经播放的都需要停止
           this.doPause(index)
           console.log('index:'+index+'已被执行暂停');
          }
        })
      }
    },
    onReady() {
      // 一启动完成，就播放第一个
      this.doPlay(0)
    },
    methods: {
      changeState(index:number){
        if(this.state[index]){
          this.doPause(index)
        }else{
          this.doPlay(current)
        }
      },
      doPlay(index:number){
        (this.$refs["video-"+index] as VideoNode).play()
        console.log("doPlay  video-"+index);
      },
      doPause(index:number){
        (this.$refs["video-"+index] as VideoNode).pause()
        console.log("doPause  video-"+index);
      },
      onPause(index:number){
        this.state[index] = false
        console.log('onPause',index);
      },
      onPlay(index:number){
        this.state[index] = true
        console.log('onPlay',index);
      },
      getData() : ListItem[] {
        /* Promise 暂不支持
        Promise<void> 
        return new Promise((resolve) => {
          resolve();
        });*/
        let list = [] as ListItem[];
        for (let i = 0; i < 6; i++) {
          let index = this.list.length + i;
          let listItem : ListItem = {
            "_id": "a00" + index,
            "content": "这是第" + index + "条数据",
            "src": "https://img.cdn.aliyun.dcloud.net.cn/guide/uniapp/hellouniapp/hello-nvue-swiper-vertical-0"+(i%3+1)+".mp4"
          }
          list.push(listItem)
        }
        return list
      },
      onSwiperChange(e : SwiperChangeEvent) {
        // console.error('SwiperChangeEvent',e.detail.current);
        this.current = e.detail.current;
      },
      onTransition(/*e : SwiperTransitionEvent*/) {
        // console.log('onTransition e.detail.dx', e.detail.dx);
      }
    }
  }
</script>

<style>
  .page {
    flex: 1;
    /* width: 750rpx; */
  }

  .swiper,
  .swiper-item,
  .video,
  .video-top-view ,
  .video-cover {
    height: 750rpx;
  }

  .swiper {
    flex: 1;
    border: 1px solid #000;
  }

  .swiper-item {
    flex: 1;
    border: 1px solid red;
    padding: 10px 5px;
    position: relative;
  }

  .video {}

  .video-top-view {
    position: absolute;
    top: 0;
    left: 0;
    justify-content: center;
    align-items: center;
    align-content: center;
    border: 1px solid red;
    flex: 1;
    width: 750rpx;
  }

  .play-btn {
    width: 30px;
    height: 30px;
    color: #FFF;
  }
  .video-cover{
    position: absolute;
    width: 750rpx;
    top: 0;
    left: 0;
  }
</style>