按照需求对应的封装轮播图组件
需求暂定为:宽高,背景颜色,是否自动轮播,轮播时间间隔
封装组件:
<template>
<div class="xtx-carousel" @mouseenter="enter" @mouseleave="leave">
<ul class="carousel-body">
<li
class="carousel-item"
:class="{ fade: curIdx === idx }"
v-for="(item, idx) in sliders"
:key="item.id"
>
<RouterLink to="/">
<img :src="item.imgUrl" alt="" />
</RouterLink>
</li>
</ul>
<a href="javascript:;" @click="toggle(-1)" class="carousel-btn prev"
><i class="iconfont icon-angle-left"></i
></a>
<a href="javascript:;" class="carousel-btn next" @click="toggle(1)"
><i class="iconfont icon-angle-right"></i
></a>
<div class="carousel-indicator">
<span
v-for="(i, idx) in 5"
:key="i"
@click="curIdx = idx"
:class="{ active: idx === curIdx }"
></span>
</div>
</div>
</template>
<script>
import { onUnmounted, ref, watch } from 'vue'
export default {
props: {
sliders: {
type: Array,
default: () => []
},
autoplay: {
type: Boolean,
default: false
},
duration: {
type: Number,
default: 2000
}
},
name: 'XtxCarousel',
setup (props) {
const curIdx = ref(0)
// 自动播放
let timer = null
const autoplay = () => {
timer = setInterval(() => {
curIdx.value++
if (curIdx.value >= props.sliders.length) curIdx.value = 0
}, props.duration)
}
// sliders中有数据就自动播放
watch(() => props.sliders, (newVal, oldVal) => {
if (newVal.length > 0) {
if (props.autoplay) {
autoplay()
}
}
}, { immediate: true })
onUnmounted(() => {
clearInterval(timer)
})
const leave = () => {
if (props.autoplay) autoplay()
}
const enter = () => {
clearInterval(timer)
}
// 切换上一张和下一张
const toggle = step => {
curIdx.value += step
if (curIdx.value >= props.sliders.length) curIdx.value = 0
if (curIdx.value < 0) curIdx.value = props.sliders.length - 1
}
return { curIdx, leave, enter, toggle }
}
}
</script>
<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>
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这里简要的对其说明一下:
sliders为从上一级组件传递过来的数据列表,格式为数组
autoplay为从上级组件传递过来的布尔类型的值,意思为是否开启自动轮播
duration从上级组件传递过来的时间间隔,意为多长时间轮播一次,类型为number
props: {
sliders: {
type: Array,
default: () => []
},
autoplay: {
type: Boolean,
default: false
},
duration: {
type: Number,
default: 2000
}
},
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之后将组件定义传值即可使用,可以全局,也可局部定义,将这里将其定义到全局
在专门定义全局组件的js文件中:
//引入轮播图组件
import XtxCarousel from './xtx-carousel.vue'
const myPlugin = {
install (app) {
// app为vue的实例
// app.component('组件名',组件对象)
app.component(XtxCarousel.name, XtxCarousel)
}
}
export default myPlugin
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在main.js中引入并use()即可
// 引入全局组件
import myPlugin from '@/components/index'
createApp(App).use(store).use(router).use(myPlugin).mount('#app')
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