fjrcloud-community-app/pages/sub/community/dynamics-detail.vue

<!-- 社区动态详情页 -->
<template>
  <s-layout title="社区动态" color="#333333">
    <view class="detail-page">
      <!-- 渐变背景 -->
      <view class="gradient-bg"></view>

      <!-- 固定头部区域（标题+发布信息） -->
    <view class="detail-header" :style="{ top: navbarHeight + 'px' }">
      <view class="header-inner">
        <!-- 标题 -->
        <view class="detail-title">
          <text class="title-text">{{ detailInfo.title }}</text>
        </view>

        <!-- 发布信息 -->
        <view class="publish-info">
          <text class="community-name">{{ detailInfo.communityName }}</text>
          <text class="publish-date">{{ detailInfo.publishDate ? sheep.$helper.timeFormat(detailInfo.publishDate, 'yyyy年mm月dd日 hh:MM') : '' }}</text>
        </view>

        <!-- 分割线 -->
        <view class="divider"></view>
      </view>
    </view>

    <!-- 富文本内容 - 固定滚动区域 -->
    <scroll-view class="content-scroll" scroll-y :style="{ height: scrollHeight + 'px', top: scrollTop + 'px' }">
      <view class="content-card">
        <view class="content-inner">
          <mp-html :content="detailInfo.content"></mp-html>
        </view>
      </view>
      <!-- 底部占位 -->
      <view class="bottom-placeholder"></view>
    </scroll-view>
    </view>
  </s-layout>
</template>

<script setup>
import { ref, onMounted, nextTick, getCurrentInstance } from 'vue';
import { onLoad } from '@dcloudio/uni-app';
import DynamicsApi from '@/sheep/api/community/dynamics';
import sheep from '@/sheep';

// 详情数据
const detailInfo = ref({
  title: '',
  communityName: '',
  publishDate: '',
  content: '',
});

// 滚动区域高度
const scrollHeight = ref(0);
// 滚动区域距离顶部距离
const scrollTop = ref(0);

// 导航栏高度（px），用于固定头部避开导航栏
const navbarHeight = sheep.$platform.navbar;

// 页面加载
onLoad((options) => {
  if (options.id) {
    loadDetail(options.id);
  }
});

// 计算scroll-view高度和位置
const calcScrollHeight = () => {
  const instance = getCurrentInstance();
  nextTick(() => {
    const sysInfo = uni.getSystemInfoSync();
    const query = uni.createSelectorQuery().in(instance);

    // 获取头部区域高度
    query.select('.detail-header').boundingClientRect();
    query.exec((res) => {
      const headerRect = res[0];
      if (headerRect) {
        const safeBottom = sysInfo.safeAreaInsets?.bottom || 0;
        // scroll-view 顶部 = 导航栏高度 + 头部高度，不再依赖 headerRect.top（fixed 元素在不同平台表现不一致）
        scrollTop.value = navbarHeight + headerRect.height;
        scrollHeight.value = sysInfo.windowHeight - scrollTop.value - safeBottom;
      }
    });
  });
};

onMounted(() => {
  calcScrollHeight();
});

// 加载详情
async function loadDetail(id) {
  const { code, data } = await DynamicsApi.getDetail(id);
  if (code === 0 && data) {
    const communityName = data.author || '';

    detailInfo.value = {
      title: data.title || '',
      communityName,
      publishDate: data.publishTime || '',
      content: data.content || '',
    };

    // 等 Vue DOM 更新完成后再计算高度，避免网络延迟导致拿到旧尺寸
    nextTick(() => {
      calcScrollHeight();
    });
  }
}
</script>

<style lang="scss" scoped>
/* 页面容器 */
.detail-page {
  position: relative;
  z-index: 1;
}

/* 渐变背景 */
.gradient-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 750rpx;
  height: 660rpx;
  background: linear-gradient(180deg, #F8EDE8 0%, #F5F5F5 50%);
  z-index: 0;
  pointer-events: none;
}

/* 固定头部区域 */
.detail-header {
  position: fixed;
  left: 0;
  width: 100%;
  z-index: 10;
  background: transparent;
}

.header-inner {
  padding: 0 32rpx;
}

/* 文章标题 */
.detail-title {
  padding: 32rpx 0 24rpx;

  .title-text {
    font-size: 40rpx;
    font-weight: 600;
    color: #333333;
    line-height: 1.5;
    font-family: 'PingFang SC', sans-serif;
  }
}

/* 发布信息 */
.publish-info {
  display: flex;
  align-items: center;
  gap: 16rpx;
  padding-bottom: 24rpx;
  justify-content: space-between;


  .community-name {
    font-size: 28rpx;
    color: #666666;
    font-family: 'PingFang SC', sans-serif;
  }

  .publish-date {
    font-size: 26rpx;
    color: #999999;
    font-family: 'PingFang SC', sans-serif;
  }
}

/* 分割线 */
.divider {
  height: 1rpx;
  background-color: #E5E5E5;
  margin-bottom: 32rpx;
}

/* 内容滚动区域 - 固定定位 */
.content-scroll {
  position: fixed;
  left: 0;
  width: 100%;
  z-index: 5;
}

/* 内容卡片 */
.content-card {
  border-radius: 24rpx;
  padding: 32rpx;
}

/* 富文本内容 */
.content-inner {
  :deep(p) {
    font-size: 30rpx;
    color: #333333;
    line-height: 1.8;
    margin-bottom: 24rpx;
    font-family: 'PingFang SC', sans-serif;
  }

  :deep(img) {
    width: 100%;
    border-radius: 16rpx;
    margin: 16rpx 0;
  }
}

/* 底部占位 */
.bottom-placeholder {
  height: 40rpx;
}
</style>