feat(todo页面): 优化待办列表滚动加载体验

1. 新增scroll-view高度动态计算适配不同设备
2. 将原scrolltolower触发改为滑动手势触发加载更多
3. 添加加载冷却期防止重复触发
4. 新增底部滑动提示动画
5. 重构加载更多逻辑并添加调试日志

apps/hand-factory/pages/todo/index.vue

@@ -33,10 +33,12 @@
     <scroll-view
       scroll-y
       class="list-container"
+      :style="{ height: scrollViewHeight + 'px' }"
       :refresher-enabled="true"
       :refresher-triggered="refreshing"
       @refresherrefresh="onRefresh"
-      @scrolltolower="onLoadMore"
+      @scroll="onScroll"
+      lower-threshold="100"
     >
       <!-- 待贴标签列表 -->
       <view v-if="activeTab === 'label'" class="coil-list">
@@ -67,12 +69,17 @@
         <uni-load-more status="loading" />
       </view>
       
-      <!-- 加载更多 -->
-      <view v-if="activeTab === 'label' && list.length > 0" class="load-more-wrapper" @click="onLoadMore">
-        <uni-load-more 
-          :status="loadMoreStatus"
-          :content-text="{ contentdown: '点击加载更多', contentrefresh: '加载中...', contentnomore: '没有更多了' }"
-        />
+      <!-- 加载更多提示 -->
+      <view v-if="activeTab === 'label' && list.length > 0 && list.length < total" class="load-more-wrapper">
+        <view v-if="isAtBottom && canLoadMore" class="bottom-hint">
+          <text class="hint-text">↑ 向上滑动加载更多</text>
+        </view>
+        <view v-else @click="onLoadMore">
+          <uni-load-more
+            :status="loadMoreStatus"
+            :content-text="{ contentdown: '点击加载更多', contentrefresh: '加载中...', contentnomore: '没有更多了' }"
+          />
+        </view>
       </view>
     </scroll-view>
     
@@ -101,6 +108,7 @@ export default {
   data() {
     return {
       statusBarHeight: 0,
+      scrollViewHeight: 0,  // scroll-view 计算高度
       tabs: [
         { key: 'label', label: '待贴标签', badge: 0 },
         { key: 'inspect', label: '检验任务', badge: 0 },
@@ -111,6 +119,10 @@ export default {
       list: [],
       loading: false,
       refreshing: false,
+      loadMoreCooldown: false,  // 加载更多冷却期标志
+      isAtBottom: false,        // 是否滑动到底部
+      canLoadMore: false,       // 是否可以加载更多（需要再次向上滑动）
+      lastScrollTop: 0,         // 上次滚动位置
       query: {
         pageNum: 1,
         pageSize: 10,
@@ -129,10 +141,18 @@ export default {
     // 获取状态栏高度
     const systemInfo = uni.getSystemInfoSync()
     this.statusBarHeight = systemInfo.statusBarHeight || 0
+    // 计算 scroll-view 高度
+    this.calcScrollViewHeight()
+  },
+  onReady() {
+    // 页面就绪后再次计算高度（确保布局完成）
+    this.$nextTick(() => {
+      this.calcScrollViewHeight()
+    })
   },
   computed: {
     loadMoreStatus() {
-      if (this.loading) return 'loading'
+      if (this.loading || this.loadMoreCooldown) return 'loading'
       if (this.list.length >= this.total) return 'noMore'
       return 'more'
     }
@@ -141,6 +161,36 @@ export default {
     this.fetchList()
   },
   methods: {
+    // 计算 scroll-view 高度
+    calcScrollViewHeight() {
+      const systemInfo = uni.getSystemInfoSync()
+      const windowHeight = systemInfo.windowHeight
+      const statusBarHeight = systemInfo.statusBarHeight || 0
+      
+      // 各区域高度（单位：px）
+      const navBarHeight = 44  // 导航栏高度
+      const tabBarHeight = 50  // Tab栏高度
+      const filterBarHeight = 60  // 筛选栏高度（留有余量）
+      const bottomSafeArea = systemInfo.safeAreaInsets?.bottom || 0  // 底部安全区域
+      const tabBarOffset = 50  // 底部TabBar高度
+      
+      // 计算 scroll-view 可用高度（确保最小高度为200px）
+      let calcHeight = windowHeight - statusBarHeight - navBarHeight - tabBarHeight - filterBarHeight - bottomSafeArea - tabBarOffset
+      this.scrollViewHeight = Math.max(calcHeight, 200)
+      
+      console.log('scroll-view 高度计算:', {
+        windowHeight,
+        statusBarHeight,
+        navBarHeight,
+        tabBarHeight,
+        filterBarHeight,
+        bottomSafeArea,
+        tabBarOffset,
+        calcHeight,
+        scrollViewHeight: this.scrollViewHeight
+      })
+    },
+    
     // 切换Tab
     handleTabChange(key) {
       this.activeTab = key
@@ -212,6 +262,11 @@ export default {
       } finally {
         this.loading = false
         this.refreshing = false
+        // 延迟解除冷却期，防止立即再次触发加载
+        setTimeout(() => {
+          this.loadMoreCooldown = false
+          console.log('加载冷却期结束')
+        }, 500)
       }
     },
     
@@ -248,21 +303,97 @@ export default {
       this.fetchList()
     },
     
-    // 加载更多
-    onLoadMore() {
-      console.log('触发加载更多', {
+    // 滚动事件处理
+    onScroll(e) {
+      const scrollTop = e.detail.scrollTop
+      const scrollHeight = e.detail.scrollHeight
+      const clientHeight = this.scrollViewHeight
+
+      // 防止无效值
+      if (!scrollHeight || !clientHeight) return
+
+      // 判断是否滑动到底部（距离底部小于 150px）
+      const distanceToBottom = scrollHeight - scrollTop - clientHeight
+      const isNearBottom = distanceToBottom < 150
+
+      // 判断滑动方向（增加最小变化阈值，防止微小抖动）
+      const scrollDelta = scrollTop - this.lastScrollTop
+      const isScrollingDown = scrollDelta > 3
+      const isScrollingUp = scrollDelta < -3
+
+      console.log('滚动事件:', {
+        scrollTop,
+        scrollHeight,
+        clientHeight,
+        distanceToBottom,
+        isNearBottom,
+        isScrollingDown,
+        isScrollingUp,
+        isAtBottom: this.isAtBottom,
+        canLoadMore: this.canLoadMore
+      })
+
+      // 如果滑动到底部，标记状态但不加载
+      if (isNearBottom && !this.isAtBottom) {
+        console.log('滑动到底部，等待再次向上滑动触发加载')
+        this.isAtBottom = true
+        this.canLoadMore = true
+      }
+
+      // 如果已经到底部，并且用户开始向上滑动，触发加载
+      if (this.isAtBottom && this.canLoadMore && isScrollingUp) {
+        console.log('底部后向上滑动，触发加载更多')
+        this.canLoadMore = false
+        this.doLoadMore()
+      }
+
+      // 如果离开底部区域，重置状态
+      if (!isNearBottom && this.isAtBottom) {
+        console.log('离开底部区域')
+        this.isAtBottom = false
+        this.canLoadMore = false
+      }
+
+      // 只有滑动方向明确时才更新 lastScrollTop
+      if (Math.abs(scrollDelta) > 3) {
+        this.lastScrollTop = scrollTop
+      }
+    },
+    
+    // 实际执行加载更多
+    doLoadMore() {
+      console.log('执行加载更多', {
         listLength: this.list.length,
         total: this.total,
         loading: this.loading,
+        loadMoreCooldown: this.loadMoreCooldown,
         pageNum: this.query.pageNum
       })
-      if (this.list.length >= this.total || this.loading) {
-        console.log('加载更多被阻止：已到最后一页或正在加载中')
+      
+      // 防抖保护：如果正在加载、冷却期或已到最后一页，直接返回
+      if (this.list.length >= this.total || this.loading || this.loadMoreCooldown) {
+        console.log('加载更多被阻止：已到最后一页、正在加载中或冷却期内')
         return
       }
-      this.query.pageNum++
-      console.log('加载第', this.query.pageNum, '页')
-      this.fetchList(true)
+      
+      // 设置冷却期，防止连续触发
+      this.loadMoreCooldown = true
+      
+      // 增加短暂延迟，防止 scrolltolower 立即重复触发
+      if (this._loadMoreTimer) {
+        clearTimeout(this._loadMoreTimer)
+      }
+      
+      this._loadMoreTimer = setTimeout(() => {
+        this.query.pageNum++
+        console.log('加载第', this.query.pageNum, '页')
+        this.fetchList(true)
+      }, 150)
+    },
+    
+    // 加载更多（点击按钮时调用）
+    onLoadMore() {
+      this.doLoadMore()
     },
     
     // 重贴标签
@@ -397,9 +528,10 @@ export default {
   }
   
   .list-container {
-    flex: 1;
     padding: 20rpx;
     box-sizing: border-box;
+    overflow-y: auto;
+    -webkit-overflow-scrolling: touch;
     
     .coil-list {
       padding-bottom: 40rpx;
@@ -416,6 +548,31 @@ export default {
       }
     }
 
+    .bottom-hint {
+      padding: 30rpx 0 50rpx;
+      display: flex;
+      justify-content: center;
+      align-items: center;
+
+      .hint-text {
+        font-size: 28rpx;
+        color: #1a73e8;
+        font-weight: 500;
+        animation: pulse 1.5s ease-in-out infinite;
+      }
+    }
+
+    @keyframes pulse {
+      0%, 100% {
+        opacity: 0.5;
+        transform: translateY(0);
+      }
+      50% {
+        opacity: 1;
+        transform: translateY(-3rpx);
+      }
+    }
+
     .placeholder-page {
       display: flex;
       flex-direction: column;