1

package1/group/groupBuySingle.vue

@@ -630,7 +630,7 @@
 					const sysInfo = uni.getSystemInfoSync();
 					const bottomBarPx = Math.round(80 * sysInfo.windowWidth / 375);
 					const h = sysInfo.windowHeight - this.navBarHeight - bottomBarPx;
-					return 'display:flex;position:fixed;left:0;top:' + this.navBarHeight + 'px;width:100%;height:' + h + 'px;z-index:50;background:#F5F8F5;padding:0 2.5%;box-sizing:border-box;';
+					return 'display:flex;position:fixed;left:0;top:' + this.navBarHeight + 'px;width:95%;margin:0 auto;right:0;height:' + h + 'px;z-index:50;background:#F5F8F5;box-sizing:border-box;';
 				} else {
 					return 'display:flex;height:72%;margin-top:20rpx;';
 				}
@@ -731,10 +731,18 @@
 			this.lastScrollTop = e.scrollTop;
 			// 当页面滚动到container应该触顶的位置时，启用吸顶
 			const stickyThreshold = this.containerOriginalTop - this.navBarHeight;
-			if (e.scrollTop >= stickyThreshold && stickyThreshold > 0) {
+			if (stickyThreshold <= 0) return;
+			if (e.scrollTop >= stickyThreshold) {
 				if (!this.isContainerSticky) {
 					this.isContainerSticky = true;
 				}
+				// 限制页面滚动不超过吸顶阈值，防止吸顶后页面继续滚动
+				if (e.scrollTop > stickyThreshold + 5) {
+					uni.pageScrollTo({
+						scrollTop: stickyThreshold,
+						duration: 0
+					});
+				}
 			} else {
 				if (this.isContainerSticky) {
 					this.isContainerSticky = false;
@@ -887,32 +895,46 @@
 				}
 
 				const selectedCategory = this.menuList[index];
-				// 如果是"猜你喜欢"（id为空），滚动到顶部
+				// 如果是"推荐"（id为tuijian或空），滚动到顶部
 				if (!selectedCategory.id && selectedCategory.id !== 0) {
 					this.goodsListScrollTop = 0;
 					this.$nextTick(() => {
 						this.goodsListScrollTop = 0;
 					});
-				} else {
-					
-					// 通过scroll-into-view滚动到对应分类的第一个商品
+					setTimeout(() => { this.isSwitching = false; }, 300);
+					this.$forceUpdate();
+					return;
+				}
+
+				// 滚动到对应分类的首个商品
+				const doScrollToCategory = () => {
 					const targetId = 'category-' + selectedCategory.id;
-					// 先清空再设置，确保同一个id也能触发滚动
 					this.scrollIntoViewId = '';
 					this.$nextTick(() => {
 						this.isAutoScrolling = true;
 						this.scrollIntoViewId = targetId;
-						// 延迟恢复滚动检测，避免自动滚动触发分类切换
 						setTimeout(() => {
 							this.isAutoScrolling = false;
 							this.isSwitching = false;
 						}, 500);
 					});
-					return;
+				};
+
+				// 如果还没吸顶，先滚动页面到吸顶位置，再滚动商品列表
+				if (!this.isContainerSticky) {
+					const stickyThreshold = this.containerOriginalTop - this.navBarHeight;
+					uni.pageScrollTo({
+						scrollTop: stickyThreshold,
+						duration: 200,
+						complete: () => {
+							setTimeout(() => {
+								doScrollToCategory();
+							}, 250);
+						}
+					});
+				} else {
+					doScrollToCategory();
 				}
-				setTimeout(() => { 
-					this.isSwitching = false;
-				}, 300);
 				this.$forceUpdate();
 			},
 			openOrderWait(item){