jiapuapp/components/family/VerticalVideoViewer.vue

<template>
  <view v-if="visible" class="vertical-video-viewer">
    <view class="vertical-video-viewer__header">
      <button aria-label="关闭上下滑动播放" @click="close">返回</button>
      <text>{{ title }}</text>
      <text>{{ activeIndex + 1 }}/{{ videos.length }}</text>
    </view>

    <swiper
      class="vertical-video-viewer__swiper"
      vertical
      :current="activeIndex"
      :duration="260"
      @change="changeVideo"
    >
      <swiper-item v-for="(video, index) in videos" :key="video.id">
        <view class="vertical-video-viewer__slide">
          <video
            :id="videoElementId(video)"
            class="vertical-video-viewer__player"
            :src="video.videoFile.accessUrl"
            :poster="video.coverFile?.accessUrl || ''"
            :autoplay="visible && index === activeIndex"
            loop
            controls
            object-fit="contain"
          />
          <view class="vertical-video-viewer__summary">
            <text class="vertical-video-viewer__title">{{ video.title }}</text>
            <text v-if="video.description" class="vertical-video-viewer__description">{{ video.description }}</text>
            <view class="vertical-video-viewer__actions">
              <button :disabled="actionBusy" @click="requestLike(video)">
                {{ video.likedByCurrentUser ? "已赞" : "点赞" }} {{ video.likeCount || 0 }}
              </button>
              <button :disabled="actionBusy" @click="requestComments(video)">
                评论 {{ video.commentCount || 0 }}
              </button>
            </view>
          </view>
        </view>
      </swiper-item>
    </swiper>
  </view>
</template>

<script setup>
import { nextTick, ref, watch } from "vue";

const props = defineProps({
  visible: { type: Boolean, default: false },
  videos: { type: Array, default: () => [] },
  initialVideoId: { type: [String, Number], default: "" },
  title: { type: String, default: "视频播放" },
  actionBusy: { type: Boolean, default: false },
});
const emit = defineEmits(["close", "like", "comments"]);
const activeIndex = ref(0);

const videoElementId = (video) => `vertical-video-${String(video.id)}`;
const pauseVideo = (index) => {
  const video = props.videos[index];
  if (!video) return;
  uni.createVideoContext(videoElementId(video))?.pause();
};
const playVideo = (index) => {
  const video = props.videos[index];
  if (!video) return;
  uni.createVideoContext(videoElementId(video))?.play();
};
const resolveInitialIndex = () => {
  const requestedId = String(props.initialVideoId || "");
  const requestedIndex = props.videos.findIndex(
    (video) => String(video.id) === requestedId,
  );
  return requestedIndex >= 0 ? requestedIndex : 0;
};

watch(
  () => props.visible,
  async (visible) => {
    if (!visible) {
      pauseVideo(activeIndex.value);
      return;
    }
    activeIndex.value = resolveInitialIndex();
    await nextTick();
    playVideo(activeIndex.value);
  },
);

const changeVideo = async (event) => {
  const nextIndex = Number(event?.detail?.current ?? 0);
  if (!Number.isInteger(nextIndex) || nextIndex < 0 || nextIndex >= props.videos.length) return;
  pauseVideo(activeIndex.value);
  activeIndex.value = nextIndex;
  await nextTick();
  playVideo(activeIndex.value);
};
const close = () => {
  pauseVideo(activeIndex.value);
  emit("close");
};
const requestLike = (video) => emit("like", video);
const requestComments = (video) => {
  pauseVideo(activeIndex.value);
  emit("comments", video);
};
</script>

<style scoped lang="scss">
.vertical-video-viewer {
  position: fixed;
  z-index: 40;
  inset: 0;
  display: flex;
  flex-direction: column;
  color: #fff;
  background: #080808;
}
.vertical-video-viewer__header {
  display: grid;
  min-height: 88rpx;
  padding: calc(12rpx + env(safe-area-inset-top)) 24rpx 12rpx;
  grid-template-columns: 120rpx 1fr 120rpx;
  align-items: center;
  background: rgba(0, 0, 0, 0.82);
  text-align: center;
}
.vertical-video-viewer__header button,
.vertical-video-viewer__actions button {
  min-height: 64rpx;
  border: 1rpx solid rgba(255, 255, 255, 0.35);
  border-radius: 32rpx;
  color: #fff;
  background: rgba(0, 0, 0, 0.42);
  font-size: 26rpx;
  line-height: 1;
}
.vertical-video-viewer__header button {
  padding: 0 20rpx;
  justify-self: start;
}
.vertical-video-viewer__header text:nth-child(2) {
  overflow: hidden;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.vertical-video-viewer__header text:last-child {
  justify-self: end;
  color: rgba(255, 255, 255, 0.72);
}
.vertical-video-viewer__swiper,
.vertical-video-viewer__slide {
  min-height: 0;
  flex: 1;
}
.vertical-video-viewer__slide {
  position: relative;
  display: flex;
  height: 100%;
  align-items: center;
  background: #080808;
}
.vertical-video-viewer__player {
  width: 100%;
  height: 100%;
}
.vertical-video-viewer__summary {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 80rpx 30rpx calc(28rpx + env(safe-area-inset-bottom));
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.86));
  pointer-events: none;
}
.vertical-video-viewer__summary text {
  display: block;
}
.vertical-video-viewer__title {
  font-size: 34rpx;
  font-weight: 700;
}
.vertical-video-viewer__description {
  display: -webkit-box !important;
  overflow: hidden;
  margin-top: 12rpx;
  color: rgba(255, 255, 255, 0.82);
  font-size: 26rpx;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.vertical-video-viewer__actions {
  display: flex;
  margin-top: 22rpx;
  gap: 16rpx;
  pointer-events: auto;
}
.vertical-video-viewer__actions button {
  min-width: 150rpx;
  padding: 0 24rpx;
}
@media (prefers-reduced-motion: reduce) {
  .vertical-video-viewer__swiper { scroll-behavior: auto; }
}
</style>