小程序组件

<template>
	<view class="uni-tabbar">
		<view class="uni-tabbar__item" v-for="(item,index) in tabbarArr" :key="index" @tap="changeTab(item)">
			<view class="uni-tabbar__bd">
				<view class="uni-tabbar__icon">
					<image v-if="item.pagePath == pagePath" class="icon-img" mode="aspectFit" :src="item.selectedIconPath"></image>
					<image v-else class="icon-img" mode="aspectFit" :src="item.iconPath"></image>
				</view>
			</view>
			<view class="uni-tabbar__label" :class="{'active': item.pagePath == pagePath}">
				{{item.text}}
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		props: {
			pagePath: String
		},
		data() {
			return {
				page: 'contact',
				showPage: false,
				containerHeight: 400,
				isShop:false,
				tabbar: [
					//动态切换的菜单，先隐藏，动态插入
					{
						"pagePath": "/pages/index/index",
						"iconPath": "/static/tab-home.png",
						"selectedIconPath": "/static/tab-home-current.png",
						"text": "首页"
					},
					{
						"pagePath": "/pages/category/category",
						"iconPath": "/static/tab-cate.png",
						"selectedIconPath": "/static/tab-cate-current.png",
						"text": "分类"
					},
					{
						"pagePath": "/pages/cart/cart",
						"iconPath": "/static/tab-cart.png",
						"selectedIconPath": "/static/tab-cart-current.png",
						"text": "购物车"
					},
					{
						"pagePath": "/pages/user/user",
						"iconPath": "/static/tab-my.png",
						"selectedIconPath": "/static/tab-my-current.png",
						"text": "我的"
					}
				],
				tabbarShop: [
					//动态切换的菜单，先隐藏，动态插入
					{
						"pagePath": "/pages/index/index",
						"iconPath": "/static/tab-home.png",
						"selectedIconPath": "/static/tab-home-current.png",
						"text": "首页1"
					},
					{
						"pagePath": "/pages/category/category",
						"iconPath": "/static/tab-cate.png",
						"selectedIconPath": "/static/tab-cate-current.png",
						"text": "分类1"
					},
					{
						"pagePath": "/pages/cart/cart",
						"iconPath": "/static/tab-cart.png",
						"selectedIconPath": "/static/tab-cart-current.png",
						"text": "购物车1"
					},
					{
						"pagePath": "/pages/user/user",
						"iconPath": "/static/tab-my.png",
						"selectedIconPath": "/static/tab-my-current.png",
						"text": "我的1"
					}
				]
			};
		},
		computed:{
			tabbarArr:function(){
				if(this.isShop){
					return this.tabbarShop
				}else{
					return this.tabbar
				}										
			}
		},
		methods: {
			changeTab(item) {
				this.page = item.pagePath;
				// 使用reLaunch关闭所有的页面，打开新的栏目页面
				uni.reLaunch({
					url: this.page
				});
			},
		},
		// watch: {
		// 	pagePath: {
		// 		handler(val) {
		// 			console.log('pagePath监听===val', val)
		// 		},
		// 		immediate: true
		// 	}
		// },
	}
</script>

<style lang="scss" scoped>
	.uni-tabbar {
		position: fixed;
		bottom: 0;
		left: 0;
		z-index: 999;
		width: 100%;
		display: flex;
		justify-content: space-around;
		height: 98upx;
		padding: 16upx 0;
		box-sizing: border-box;
		border-top: solid 1upx #ccc;
		background-color: #fff;
		box-shadow: 0px 0px 17upx 1upx rgba(206, 206, 206, 0.32);

		.uni-tabbar__item {
			display: block;
			line-height: 24upx;
			font-size: 20upx;
			text-align: center;
			width: 25%;
		}

		.uni-tabbar__icon {
			height: 24px;
			line-height: 24px;
			text-align: center;
		}

		.icon {
			display: inline-block;
		}

		.uni-tabbar__label {
			line-height: 24upx;
			font-size: 24upx;
			color: #999;
		}

		.icon-img {
			height: 24px;
			width: 24px;
		}
	}
</style>
<tabBar :pagePath="'/pages/cart/cart'"></tabBar>