vue3+Pinia+TypeScript 实现封装轮播图组件

目录

• 为什么封装？
• 静态结构 后面再进行更改
• 请求数据都存放在pinia里面
• 类型检测
• 页面级组件
• 全局组件

为什么封装？

• 迎合es6模块化开发思想
• 注册为全局组件，可以更好地复用，需要用到的地方，直接使用标签即可

静态结构 后面再进行更改

<script lang="ts" setup name="XtxCarousel">
defineProps()
</script>
<template>
<div>
<ul>
<li>
<RouterLink to="/">
<img
src="http://yjy-xiaotuxian-dev.oss-cn-beijing.aliyuncs.com/picture/2021-04-15/1ba86bcc-ae71-42a3-bc3e-37b662f7f07e.jpg"
alt=""
/>
</RouterLink>
</li>
<li>
<RouterLink to="/">
<img
src="http://yjy-xiaotuxian-dev.oss-cn-beijing.aliyuncs.com/picture/2021-04-15/1ba86bcc-ae71-42a3-bc3e-37b662f7f07e.jpg"
alt=""
/>
</RouterLink>
</li>
<li>
<RouterLink to="/">
<img
src="http://yjy-xiaotuxian-dev.oss-cn-beijing.aliyuncs.com/picture/2021-04-15/1ba86bcc-ae71-42a3-bc3e-37b662f7f07e.jpg"
alt=""
/>
</RouterLink>
</li>
</ul>
<a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" 
><i></i
></a>
<a href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" 
><i></i
></a>
<div>
<span></span>
<span></span>
<span></span>
<span></span>
<span></span>
</div>
</div>
</template>
<style scoped lang="less">
.xtx-carousel {
width: 100%;
height: 100%;
min-width: 300px;
min-height: 150px;
position: relative;
.carousel {
&-body {
width: 100%;
height: 100%;
}
&-item {
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
opacity: 0;
transition: opacity 0.5s linear;
&.fade {
opacity: 1;
z-index: 1;
}
img {
width: 100%;
height: 100%;
}
}
&-indicator {
position: absolute;
left: 0;
bottom: 20px;
z-index: 2;
width: 100%;
text-align: center;
span {
display: inline-block;
width: 12px;
height: 12px;
background: rgba(0, 0, 0, 0.2);
border-radius: 50%;
cursor: pointer;
~ span {
margin-left: 12px;
}
&.active {
background: #fff;
}
}
}
&-btn {
width: 44px;
height: 44px;
background: rgba(0, 0, 0, 0.2);
color: #fff;
border-radius: 50%;
position: absolute;
top: 228px;
z-index: 2;
text-align: center;
line-height: 44px;
opacity: 0;
transition: all 0.5s;
&.prev {
left: 20px;
}
&.next {
right: 20px;
}
}
}
&:hover {
.carousel-btn {
opacity: 1;
}
}
}
</style>

请求数据都存放在pinia里面

import { defineStore } from 'pinia'
import request from '@/utils/request'
import { BannerItem, IApiRes } from '@/types/data'
export default defineStore('home', {
persist: {
enabled: true
},
state() {
return {
bannerList: [] as BannerItem[]
}
},
actions: {
// 拿轮播图数据
async getBannerList() {
const res = await request.get<IApiRes<BannerItem[]>>('/home/banner')
console.log('拿轮播图数据', res)
this.bannerList = res.data.result
}
}
})

类型检测

// 所有的接口的通用类型
export interface IApiRes<T> {
msg: string,
result: T
}
// 轮播图数据中的项
export type BannerItem = {
id: string;
imgUrl: string;
hrefUrl: string;
type: string;
}

页面级组件

<script lang="ts" setup>
import useStore from '@/store';
const { home } = useStore()
// 发请求
home.getBannerList()
</script>
<template>
<div>
<!-- 轮播图子组件 -->
<XtxCarousel :slides="home.bannerList" :autoPlay="true" :duration="1000"/>
</div>
</template>
<style scoped lang="less">
.home-banner {
width: 1240px;
height: 450px;
position: absolute;
left: 0;
top: 0;
z-index: 98;
background-color: #ccc;
}
/deep/ .xtx-carousel .carousel-btn.prev {
left: 270px !important;
}
/deep/ .xtx-carousel .carousel-indicator {
padding-left: 250px;
}
</style>

全局组件

<script lang="ts" setup name="XtxCarousel">
import { BannerItem } from '@/types/data'
import { onBeforeUnmount, onMounted, ref } from 'vue';
// 定义props
const { slides, autoPlay, duration } = defineProps<{
slides: BannerItem[],
autoPlay?: boolean, // 是否开启自动播放
duration?: number // 自动播放的间隔时间
}>()
// 当前哪个图片选中 高亮
const active = ref(1)
// 点击右侧箭头++
const hNext = () => {
active.value++
if(active.value === slides.length){
active.value = 0
}
}
// 点击左侧箭头--
const hPrev = () => {
active.value--
if(active.value < 0){
active.value = slides.length - 1
}
}
// 如果开启了自动播放，则每隔duration去播放下一张： hNext()
onMounted(() => {
start()
})
onBeforeUnmount(() => {
stop()
})
let timer = -1
// 鼠标离开要继续播放
const start = () => {
if(autoPlay) {
timer = window.setInterval(() => {
hNext()
}, duration)
}
}
// 鼠标hover要暂停播放
const stop = () => {
clearInterval(timer)
}
</script>
<template>
<div @mouseleave="start()" @mouseenter="stop()">
<ul>
<li
:class="{ fade: idx === active}"
v-for="(it, idx) in slides" :key="it.id">
<RouterLink to="/">
<img :src="https://www.zhangshengrong.com/p/AvN6YqlQam/it.imgUrl" alt="" />
</RouterLink>
</li>
</ul>
<a @click="hPrev" href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><i></i></a>
<a @click="hNext" href="javascript:;" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow" ><i></i></a>
<div>
<span
v-for="(it, idx) in slides"
:class="{ active: active===idx}"
@mouseenter="active = idx"
></span>
</div>
</div>
</template>
<style scoped lang="less">
.xtx-carousel {
width: 100%;
height: 100%;
min-width: 300px;
min-height: 150px;
position: relative;
.carousel {
&-body {
width: 100%;
height: 100%;
}
&-item {
width: 100%;
height: 100%;
position: absolute;
left: 0;
top: 0;
opacity: 0; // 不可见
transition: opacity 0.5s linear;
&.fade {
opacity: 1; // 可见
z-index: 1;
}
img {
width: 100%;
height: 100%;
}
}
&-indicator {
position: absolute;
left: 0;
bottom: 20px;
z-index: 2;
width: 100%;
text-align: center;
span {
display: inline-block;
width: 12px;
height: 12px;
background: rgba(0, 0, 0, 0.2);
border-radius: 50%;
cursor: pointer;
~ span {
margin-left: 12px;
}
&.active {
background: #fff;
}
}
}
&-btn {
width: 44px;
height: 44px;
background: rgba(0, 0, 0, 0.2);
color: #fff;
border-radius: 50%;
position: absolute;
top: 228px;
z-index: 2;
text-align: center;
line-height: 44px;
opacity: 0;
transition: all 0.5s;
&.prev {
left: 20px;
}
&.next {
right: 20px;
}
}
}
&:hover {
.carousel-btn {
opacity: 1;
}
}
}
</style>

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