一、UniApp跨端能力对比

二、核心功能实现

1. 视频流组件优化

<template>
  <view class="video-container">
    <swiper 
      vertical
      :current="currentIndex"
      @change="onSwiperChange"
      :style="{height: windowHeight + 'px'}"
    >
      <swiper-item 
        v-for="(item, index) in videoList" 
        :key="item.id"
      >
        <video
          :src="item.url"
          :autoplay="currentIndex === index"
          :controls="false"
          :loop="true"
          :muted="muted"
          @play="onVideoPlay(index)"
          class="video-player"
        ></video>
      </swiper-item>
    </swiper>
  </view>
</template>

<script>
export default {
  data() {
    return {
      currentIndex: 0,
      videoList: [],
      windowHeight: 0,
      muted: false
    }
  },
  mounted() {
    this.windowHeight = uni.getSystemInfoSync().windowHeight
    this.loadVideos()
  },
  methods: {
    async loadVideos() {
      const res = await uni.request({
        url: 'https://api.example.com/videos',
        method: 'GET'
      })
      this.videoList = res.data
    },
    onSwiperChange(e) {
      this.currentIndex = e.detail.current
    }
  }
}
</script>

2. 视频预加载策略

// 预加载相邻视频
preloadAdjacentVideos() {
  const preloadCount = 2
  const start = Math.max(0, this.currentIndex - preloadCount)
  const end = Math.min(
    this.videoList.length - 1, 
    this.currentIndex + preloadCount
  )
  
  for (let i = start; i <= end; i++) {
    if (i !== this.currentIndex) {
      const videoContext = uni.createVideoContext(
        `video-${i}`, this
      )
      videoContext.seek(0).pause()
    }
  }
}

3. 社交互动功能

// 点赞动画实现
async likeVideo(videoId) {
  try {
    // 本地UI更新
    this.videoList.forEach(item => {
      if (item.id === videoId) {
        item.isLiked = true
        item.likesCount += 1
        this.playLikeAnimation()
      }
    })
    
    // 服务端同步
    await uni.request({
      url: '/api/like',
      method: 'POST',
      data: { videoId }
    })
  } catch (e) {
    console.error('点赞失败', e)
  }
},

playLikeAnimation() {
  this.animation = uni.createAnimation({
    duration: 1000,
    timingFunction: 'ease-out'
  })
  
  this.animation.scale(1.2).opacity(0).step()
  this.animation.scale(1).opacity(1).step({ duration: 0 })
  
  this.animData = this.animation.export()
}

三、性能优化方案

1. 分页加载优化

// 滚动加载更多
onReachBottom() {
  if (this.loading || !this.hasMore) return
  
  this.loading = true
  this.page += 1
  
  uni.request({
    url: '/api/videos',
    data: { page: this.page },
    success: (res) => {
      this.videoList = [...this.videoList, ...res.data]
      this.hasMore = res.data.length >= this.pageSize
    },
    complete: () => {
      this.loading = false
    }
  })
}

2. 内存管理策略

// 清理不可见视频
cleanHiddenVideos() {
  const visibleRange = 3 // 只保留前后3个视频
  
  this.videoList.forEach((item, index) => {
    if (Math.abs(index - this.currentIndex) > visibleRange) {
      const videoContext = uni.createVideoContext(
        `video-${index}`, this
      )
      videoContext.stop() // 释放资源
    }
  })
}

四、多端适配技巧

• 条件编译：处理平台差异
• 像素级适配：使用upx/rpx单位
• API兼容：封装统一接口
• 组件扩展：开发平台专属组件

发布数据对比

开发周期：原生方案1/3时间
代码复用率：85%+
性能差异：<15%
包体大小：小程序2MB/App15MB