uni-app开发微信小程序总结(二)

打开项目先运行一下看看效果

下图是小程序开发工具的预览图，再发一下项目地址：https://github.com/894658027/Shopping-Mail

u-waterfall组件地址: https://v1.uviewui.com/components/waterfall.html

代码如下：

<template>
	<view class="wrap">
		<!-- <input />  --> 
		<!-- <u-search placeholder="请输入商品名称" v-model="keyword"></u-search> -->
		<u-waterfall v-model="flowList" ref="uWaterfall">
			<template v-slot:left="{leftList}">
				<view class="demo-warter" v-for="(item, index) in leftList" :key="index" @click="nextDetail"
					:data-next='item'> 
					<!-- 警告：微信小程序中需要hx2.8.11版本才支持在template中结合其他组件，比如下方的lazy-load组件 -->
					<u-lazy-load threshold="-450" border-radius="10" :image="item.image" :index="index"></u-lazy-load>
					<view class="demo-title"> 
						{{item.title}}
					</view>
					<view class="demo-price">
						{{item.price}}元
					</view>
					<view class="demo-tag">
						<view class="demo-tag-owner">
							自营 
						</view>
						<view class="demo-tag-text">
							放心购
						</view>
					</view>
					<view class="demo-shop">
						{{item.shop}}
					</view>
					<!-- //icon-leftClose -->
			    <!-- <u-icon name="close-circle-fill" color="#fa3534" size="34" class="u-close" @click="remove(item.id)">
			    </u-icon> --> 
				</view>
			</template>
			<template v-slot:right="{rightList}">
				<view class="demo-warter" v-for="(item, index) in rightList" :key="index" @click="nextDetail" 
				    :data-next='item'>
					<u-lazy-load threshold="-450" border-radius="10" :image="item.image" :index="index"></u-lazy-load>
					<view class="demo-title">
						{{item.title}}
					</view> 
					<view class="demo-price">  
						{{item.price}}元
					</view>
					<view class="demo-tag">
						<view class="demo-tag-owner">
							自营
						</view>
						<view class="demo-tag-text">
							放心购
						</view>
					</view>
					<view class="demo-shop">
						{{item.shop}}
					</view>
					<!-- icon-rightClose -->
					<!-- <u-icon name="close-circle-fill" color="#fa3534" size="34" class="u-close" @click="remove(item.id)">
					</u-icon> -->
				</view>
			</template>
		</u-waterfall>
		<u-loadmore bg-color="rgb(240, 240, 240)" :status="loadStatus" @loadmore="addRandomData"></u-loadmore>
		<u-tabbar :list="tabbar" :mid-button="true"></u-tabbar>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				loadStatus: 'loadmore',
				tabbar: '',
				flowList: [],
				list: [{
						price: 35,
						title: '北国风光，千里冰封，万里雪飘',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 75,
						title: '望长城内外，惟余莽莽',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 385,
						title: '大河上下，顿失滔滔',
						shop: '李白杜甫白居易旗舰店',  
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 784,
						title: '欲与天公试比高',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 7891,
						title: '须晴日，看红装素裹，分外妖娆',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 2341,
						shop: '李白杜甫白居易旗舰店',
						title: '江山如此多娇，引无数英雄竞折腰',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 661,
						shop: '李白杜甫白居易旗舰店',
						title: '惜秦皇汉武，略输文采',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 1654,
						title: '唐宗宋祖，稍逊风骚',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 1678,
						title: '一代天骄，成吉思汗',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg', 
					},
					{
						price: 924,
						title: '只识弯弓射大雕',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					},
					{
						price: 8243,
						title: '俱往矣，数风流人物，还看今朝',
						shop: '李白杜甫白居易旗舰店',
						image: 'https://img.rongshulin.net/1.jpg',
					}
				]
			}
		},
		onLoad() {
			this.addRandomData();  
			// const db = uniCloud.database(); //代码块为cdb
			// console.log(uniCloud.getCurrentUserInfo());
			//db.collection("new").add({name: 'Ben'})
 
			/**
			 * 示例中为每个tabbar页面都写了一遍tabbar变量，您可以将tabbar数组写入到vuex中，这样可以全局引用
			 */
			this.tabbar = [{
					iconPath: "/static/tabbar/home2.png",
					selectedIconPath: "/static/tabbar/home.png",
					text: '首页',
					// count: 2,
					// isDot: true,
					pagePath: "/pages/index/index"
				},
				{
					iconPath: "/static/uview/example/js.png",
					selectedIconPath: "/static/uview/example/js_select.png",
					text: '图表页',
					midButton: true,
					pagePath: "/pages/echartsVue/echartsVue"
				},
				{
					iconPath: "/static/tabbar/mine2.png",
					selectedIconPath: "/static/tabbar/mine.png",
					text: '个人中心',
					pagePath: "/pages/mine/mine"
				},
			]
		},
		// onShow() {
		// 	this.addRandomData();
		// },
		onReachBottom() {
			this.loadStatus = 'loading';  
			// 模拟数据加载
			setTimeout(() => { 
				this.addRandomData();
				this.loadStatus = 'loadmore';
			}, 1000)
		},
		methods: { 
			addRandomData() {
				for (let i = 0; i < 10; i++) {
					let index = this.$u.random(0, this.list.length - 1);
					// 先转成字符串再转成对象，避免数组对象引用导致数据混乱
					let item = JSON.parse(JSON.stringify(this.list[index]))
					item.id = this.$u.guid();
					this.flowList.push(item);
				} 
			}, 
			remove(id) {
				this.$refs.uWaterfall.remove(id);
			},
			clear() {
				this.$refs.uWaterfall.clear();
			},
			nextDetail(e) {
				let datasetNext = e.currentTarget.dataset.next
				let title = datasetNext.title
				let imageUrl = datasetNext.image 
				let prices = datasetNext.price;
				uni.navigateTo({
					url: '../goodsDetail/goodsDetail?title=' + title + '&imageUrl=' + imageUrl+'&prices=' + prices
				});
			}
		}
	}
</script>

<style>
	/* page不能写带scope的style标签中，否则无效 */
	page {
		background-color: rgb(240, 240, 240);
	}
</style>

<style lang="scss" scoped>
	.demo-warter {
		border-radius: 8px;
		margin: 5px;
		background-color: #ffffff;
		padding: 8px;
		position: relative;
	}

	.u-close {
		position: absolute;
		top: 32rpx;
		right: 32rpx;
	}

	.demo-image {
		width: 100%;
		border-radius: 4px;
	}

	.demo-title {
		font-size: 30rpx;
		margin-top: 5px;
		color: $u-main-color;
	}

	.demo-tag {
		display: flex;
		margin-top: 5px;
	}

	.demo-tag-owner {
		background-color: $u-type-error;
		color: #FFFFFF;
		display: flex;
		align-items: center;
		padding: 4rpx 14rpx;
		border-radius: 50rpx;
		font-size: 20rpx;
		line-height: 1;
	}

	.demo-tag-text {
		border: 1px solid $u-type-primary;
		color: $u-type-primary;
		margin-left: 10px;
		border-radius: 50rpx;
		line-height: 1;
		padding: 4rpx 14rpx;
		display: flex;
		align-items: center;
		border-radius: 50rpx;
		font-size: 20rpx;
	}

	.demo-price {
		font-size: 30rpx;
		color: $u-type-error;
		margin-top: 5px;
	}

	.demo-shop {
		font-size: 22rpx;
		color: $u-tips-color;
		margin-top: 5px;
	}
</style>

把这些代码直接贴到pages/index/index.vue 里面就行，保存，hbuilderX自动会进行热更新刷新微信开发者工具，

<script>标签内有几个涉及生命周期的函数，需要注意一下

他们分别是 onload,onshow,这两个跟表现意思一样 ，method函数内部是用来编写我们的函数方法，比如一些点击事件等。

说完了页面布局再看下底部栏的 tabbar，在代码里可以看到

/**
			 * 示例中为每个tabbar页面都写了一遍tabbar变量，您可以将tabbar数组写入到vuex中，这样可以全局引用
			 */
			this.tabbar = [{
					iconPath: "/static/tabbar/home2.png",
					selectedIconPath: "/static/tabbar/home.png",
					text: '首页',
					// count: 2,
					// isDot: true,
					pagePath: "/pages/index/index"
				},
				{
					iconPath: "/static/uview/example/js.png",
					selectedIconPath: "/static/uview/example/js_select.png",
					text: '图表页',
					midButton: true,
					pagePath: "/pages/echartsVue/echartsVue"
				},
				{
					iconPath: "/static/tabbar/mine2.png",
					selectedIconPath: "/static/tabbar/mine.png",
					text: '个人中心',
					pagePath: "/pages/mine/mine"
				},
			]
		},

这个是底部的栏位，分别是首页，图标页，个人中心也的图标，一般情况是2-5个，可自由配置，

iconPath是图片默认状态

selectedIconPath是选中状态

text是图标文本描述

midButton 可选

pagePath是页面路径–页面跳转的指向

剩下的就没啥，直接复制代码 一把梭就行了，这个系列下个月在继续写吧。