drt/pages/category/category.vue

<template>
	<view class="content">
		<view class="dddd" style="height: 10rpx;"></view>
		<view class="flex cate-wrap" :style="{'height': height}">
			<scroll-view scroll-y="true" class="left-wrap" :style="{'height': height}">
				<view class="left-item" v-for="(leftitem,leftindex) in flist"
					:class="{'action-item': currentIndex == leftindex}" @click="leftClick(leftindex)">
					{{leftitem.cate_name}}
				</view>
			</scroll-view>
			<scroll-view scroll-y="true" class="right-wrap" :style="{'height': height}" @scrolltolower="getProducts()">
				<view class="right-item" v-for="gooditem in list"
					@click="navto('/pages/product/product?id=' + gooditem.id)">
					<image :src="gooditem.image" mode="" class="good-img"></image>
					<view class="good-info flex">
						<view class="good-name clamp2">
							{{gooditem.store_name}}
						</view>
						<view class="good-price">
							￥{{gooditem.price}}
						</view>
					</view>
				</view>
				<uni-load-more :status="loadingType"></uni-load-more>
			</scroll-view>
		</view>
	</view>
</template>
<script>
	import {
		getCategoryList,
		getProducts
	} from '@/api/product.js';
	export default {
		data() {
			return {
				sizeCalcState: false,
				tabScrollTop: 0,
				currentId: 9,
				flist: [],
				height: '',
				currentIndex: 0,
				list: [],
				page: 1,
				limit: 20,
				loadingType: 'more',
				loaded: false,
			};
		},
		onLoad() {
			this.loadData();
		},
		// 监听导航栏输入框点击事件
		onNavigationBarSearchInputClicked(e) {
			uni.navigateTo({
				url: '/pages/product/search'
			});
		},
		onReady(res) {
			var _this = this;
			uni.getSystemInfo({
				success: resu => {
					const query = uni.createSelectorQuery();
					query.select('.cate-wrap').boundingClientRect();
					query.exec(function(res) {
						_this.height = resu.windowHeight - res[0].top + 'px';
						console.log('打印页面的剩余高度', _this.height);
					});
				},
				fail: res => {}
			});
		},
		methods: {
			leftClick(index) {
				this.currentIndex = index
				this.getProducts('reload')
			},
			getProducts(type) {
				let index = this.flist[this.currentIndex].id
				if (type == 'reload') {
					this.list = []
					this.page = 1
					this.loadingType = 'more'
					this.loaded = false
				}
				if (this.loadingType == 'loading' || this.loadingType == 'noMore') {
					return
				}
				this.loadingType = 'loading'
				getProducts({
					cid: index,
					page: this.page,
					limit: this.limit
				}).then(res => {
					this.list = this.list.concat(res.data)
					if (this.limit == res.data.length) {
						this.page++
						this.loadingType = 'more'
					} else {
						this.loadingType = 'noMore'
					}
					this.loaded = true
				})
			},
			// 载入数据
			async loadData() {
				let obj = this;
				getCategoryList({})
					.then(({
						data
					}) => {
						obj.flist = data.map(function(s) {
							return s;
						});
						obj.getProducts()
					})
					.catch(err => {
						console.log(err);
					});
			},
			//一级分类点击
			tabtap(item) {
				console.log(item);
				// 判断有没有初始化页面高度对象数据
				if (!this.sizeCalcState) {
					this.calcSize();
				}
				// 获取当前点击的id
				this.currentId = item.id;
				console.log(item.top);
				this.tabScrollTop = item.top;
				console.log(this.tabScrollTop);
			},
			//右侧栏滚动
			asideScroll(e) {
				// 判断有没有初始化页面高度对象数据
				if (!this.sizeCalcState) {
					this.calcSize();
				}
				let scrollTop = e.detail.scrollTop;
				let box = 0; //列表包裹框高度初始化
				let bottom = 10; //距离页面底部多少像素左侧列表切换到最后一个一级分类
				// 查询当前页面对象
				let view = uni.createSelectorQuery().select('.content');
				view.fields({
						id: true,
						dataset: true,
						rect: true,
						size: true,
						scrollOffset: true
					},
					function(e) {
						// 保存包裹框高度
						box = e.height;
					}
				).exec();
				// 获取所有距离顶部大于滚轮距离页面高度的所有分类
				let tabs = this.flist.filter(item => (item.top - 10) <= scrollTop).reverse();
				if (tabs.length > 0) {
					// 判断是否已经到达滚轮底部
					if (box + scrollTop + bottom >= e.detail.scrollHeight) {
						this.currentId = this.flist[this.flist.length - 1].id;
					} else {
						this.currentId = tabs[0].id;
					}
				}
			},
			//计算右侧栏每个tab的高度等信息
			calcSize() {
				let h = 0;
				this.flist.forEach(item => {
					let view = uni.createSelectorQuery().select('#main-' + item.id);
					view.fields({
							size: true
						},
						data => {
							item.top = h;
							h += data.height;
							item.bottom = h;
						}
					).exec();
				});
				this.sizeCalcState = true;
			},
			navToList(sid, tid) {
				// 点击导航跳转到详细页面
				uni.navigateTo({
					url: '/pages/product/list?fid=' + this.currentId + '&sid=' + sid + '&tid=' + tid
				});
			},
			navto(url) {
				uni.navigateTo({
					url
				})
			}
		}
	};
</script>
<style lang="scss">
	.cate-wrap {
		width: 750rpx;

		.left-wrap {
			width: 180rpx;
			flex-shrink: 0;
			background-color: #f2f2f2;

			.left-item {
				width: 180rpx;
				height: 100rpx;
				line-height: 100rpx;
				font-size: 28rpx;
				font-weight: 500;
				color: #666666;
				text-align: center;
			}

			.action-item {
				background-color: #fff;
				font-weight: bold;
				position: relative;

				&::before {
					content: '';
					position: absolute;
					top: 0;
					left: 0;
					width: 3rpx;
					height: 100rpx;
					background: #418c78;
				}
			}
		}

		.right-wrap {
			flex-wrap: 1;
			background-color: #fff;

			.right-item {
				width: 520rpx;
				height: 240rpx;
				padding: 30rpx 0;
				margin: 0 auto;
				border-bottom: 1px solid #eee;
				display: flex;
				justify-content: flex-start;
				align-items: center;

				.good-img {
					flex-shrink: 0;
					width: 180rpx;
					height: 180rpx;
					border-radius: 20rpx;
				}

				.good-info {
					flex-direction: column;
					justify-content: space-between;
					align-items: flex-start;
					height: 100%;
					padding-left: 25rpx;

					.good-name {
						font-size: 30rpx;
						font-weight: bold;
						color: #333333;
					}

					.good-price {
						font-size: 34rpx;
						font-weight: bold;
						color: #FF4C4C;
					}
				}
			}
		}
	}
</style>