1. components資料夾下新建tabar元件

<template>
    <view>
        <u-tabbar :value="current?current:0" @change="changeTab" :fixed="true" :placeholder="false"
            :safeAreaInsetBottom="true" :border="false">
            <u-tabbar-item v-for="(item,index) in list" :key="index" :text="item.text">
                <image class="u-page__item__slot-icon" slot="active-icon" :src="item.iconPath"></image>
                <image class="u-page__item__slot-icon" slot="inactive-icon" :src="item.selectedIconPath"></image>
            </u-tabbar-item>
        </u-tabbar>
    </view>
</template>

<script>
    export 
 
default {
        name: 'tabar',
        props: {
            current: Number
        },
        data() {
            return {
                list: [{
                        iconPath: "../../static/tabar/1.png",
                        selectedIconPath: "../../static/tabar/4.png",
                        text: 
 
'首頁',
                        customIcon: false,
                        pagePath: "pages/index/index"
                    },
                    {
                        iconPath: "../../static/tabar/2.png",
                        selectedIconPath: "../../static/tabar/5.png",
                        text: 
 
'已購課程',
                        customIcon: false,
                        pagePath: "pages/cart/index"
                    },
                    {
                        iconPath: "../../static/tabar/3.png",
                        selectedIconPath: "../../static/tabar/6.png",
                        text: '我的',
                        customIcon: false,
                        pagePath: "pages/mine/index"
                    }
                ],
            }
        },
        methods: {
            changeTab(e) {
                console.log(e)
                uni.switchTab({
                    url: '/' + this.list[e].pagePath,
                })
            }
        }
    }
</script>

<style scoped>
    image {
        width: 32rpx;
        height: 32rpx;
    }
</style>

2.main.js掛載元件

 3.page.json新增tabbar

 4.在使用tabbar的頁面使用元件