lucky_shop/pages_goods/category.vue

<template>
	<view :style="themeColor">
		<!-- 使用 item.id / componentName 稳定 key 避免 v-for 在 diyData 整体重赋值时把组件整个销毁重建, 引发频闪 -->
		<view v-if="diyData && diyData.value && diyData.value.length">
			<block v-for="(item, index) in diyData.value" :key="index">
				<view v-if="item.componentName == 'GoodsCategory'">
					<diy-category @tologin="toLogin" ref="category" :value="item"></diy-category>
				</view>
			</block>
		</view>

		<ns-login ref="login"></ns-login>

		<loading-cover ref="loadingCover"></loading-cover>

		<!-- 隐私弹窗 -->
		<privacy-popup ref="privacyPopup"></privacy-popup>

		<!-- 底部tabBar: loading 期间隐藏, 等 loading-cover 关闭后下一 tick 再挂载, 避免 TabBar 与 loading-cover 同时 GPU 合成导致频闪 -->
		<view id="tab-bar" v-if="!loadingVisible">
			<diy-bottom-nav></diy-bottom-nav>
		</view>
	</view>
</template>

<script>
export default {
	data() {
		return {
			diyData: { value: [] },
			mpShareData: null, //小程序分享数据
			// 修复底部 TabBar 频闪: 用本地 loadingVisible 状态镜像 <loading-cover> 的可见性,
			// loading-cover 的 spin 动画与 diy-bottom-nav 都是 fixed/z-index 高 + GPU 合成,
			// 在 MP-Weixin 下会互相触发重绘, 让用户看到 TabBar 抖动。
			// 策略: loading-cover 显示期间, 也把 tabBar 先收起来, loading-cover 隐藏后
			// 下一次 nextTick 再放出 tabBar, 把整段 loading 过程的合成层冲突降到最低。
			loadingVisible: true
		};
	},
	onLoad() {
		this.$util.hideHomeButton();
		//刷新多语言
		this.$langConfig.refresh();
		this.getDiyInfo();
	},
	onShow() {
		this.$util.hideHomeButton();
		try {
			// 鸿蒙元服务 JSVM 下 $refs.category 可能为 undefined, 需防御
			// 节流: 避免 onShow 重复触发 pageShow() 中的 getHeightArea(-1) 高耗时选择器查询, 引起频闪和性能损耗
			const now = Date.now();
			if (this._lastPageShowTime && now - this._lastPageShowTime < 500) {
				// 短时间内重复触发, 跳过本次 pageShow
			} else if (this.$refs.category && this.$refs.category[0]) {
				this.$refs.category[0].pageShow();
				this._lastPageShowTime = now;
			}
		} catch (e) {
			console.warn('onShow pageShow failed', e);
		}

		//小程序分享
		// #ifdef MP-WEIXIN
		this.$util.getMpShare('/pages_goods/category').then(res => {
			this.mpShareData = res;
		}).catch(err => {
			// 如果后台没配置，用默认值
			this.mpShareData = {
				appMessage: {
					title: this.$lang('goods.category.shareTitle'),
					path: '/pages_goods/category'
				},
				timeLine: {
					title: this.$lang('goods.category.shareTitle'),
					query: '/pages_goods/category'
				}
			};
		});
		// #endif
	},
	onUnload() {
		try {
			if (!this.storeToken && this.$refs.login && typeof this.$refs.login.cancelCompleteInfo === 'function') {
				this.$refs.login.cancelCompleteInfo();
			}
		} catch (e) {
			console.warn('onUnload cancelCompleteInfo failed', e);
		}
	},
	methods: {
		getDiyInfo() {
			// 避免重复请求导致布局抖动
			if (this._diyInfoLoading) return;
			this._diyInfoLoading = true;

			this.$api.sendRequest({
				url: '/api/diyview/info',
				data: {
					name: 'DIY_VIEW_GOODS_CATEGORY'
				},
				success: res => {
					if (res.code == 0 && res.data) {
						const newData = res.data.value ? JSON.parse(res.data.value) : res.data;
						// 仅在数据真正变化时赋值,避免鸿蒙元服务下频繁 re-render 造成频闪
						if (JSON.stringify(newData) !== JSON.stringify(this.diyData)) {
							this.diyData = newData;
						}
					} else {
						this.$util.showToast({
							title: this.$lang('diy.noDiyData')
						});
					}
				},
				fail: err => {
					console.error('getDiyInfo request failed', err);
					this.$util.showToast({
						title: this.$lang('diy.networkError')
					});
				},
				complete: () => {
					this._diyInfoLoading = false;
					if (this.$refs.loadingCover) this.$refs.loadingCover.hide();
					uni.stopPullDownRefresh();
					// loading-cover 收起后, 等下一 tick 让出 frame, 再挂载 diy-bottom-nav
					// (避免两个 fixed 高 z-index GPU 合成层在同帧 mount 触发 MP-Weixin 重绘频闪)
					this.$nextTick(() => {
						this.$nextTick(() => {
							this.loadingVisible = false;
						});
					});
				}
			});
		},
		toLogin() {
			this.redirectTologin('/pages_goods/category');
		}
	},
	onPullDownRefresh() {
		uni.hideTabBar();
		this.getDiyInfo();
	},
	onShareAppMessage() {
		return this.mpShareData?.appMessage || {
			title: this.$lang('goods.category.shareTitle'),
			path: '/pages_goods/category'
		};
	},
	onShareTimeline() {
		return this.mpShareData?.timeLine || {
			title: this.$lang('goods.category.shareTitle'),
			query: '/pages_goods/category'
		};
	},
	onAddToFavorites() {
		return {
			title: this.$lang('goods.category.shareTitle'),
			path: '/pages_goods/category'
		};
	}
};
</script>

<style lang="scss">
::v-deep .uni-popup__wrapper.uni-center {
	background: rgba(0, 0, 0, 0.6);
}

::v-deep .uni-popup__wrapper-box {
	border-radius: 0 !important;
}

::v-deep .uni-popup__wrapper.uni-custom.center .uni-popup__wrapper-box {
	overflow-y: visible;
}

::v-deep .loading-layer {
	background: #fff !important;
}

// 分类四一级展开
::v-deep .category-template-4 .template-four .uni-popup__wrapper-box {
	border-radius: 0px 0px 14px 14px !important;
	overflow: hidden;
}

::v-deep .category-template-4 .content-wrap .categoty-goods-wrap .goods-list {
	margin-top: 30rpx;
}

::v-deep .category-template-4 .content-wrap .goods-list .goods-item .footer-wrap .right-wrap .num-action {
	width: 46rpx;
	height: 46rpx;
}

::v-deep .uni-page-refresh-inner .uni-page-refresh__path {
	stroke: rgb(1, 1, 1) !important;
}
</style>