基于vue3怎么实现图片散落效果？下面本篇文章给大家介绍一下使用vue3实现图片散落效果的方法，希望对大家有所帮助！
今天又是美好的摸鱼一天，刚刚进入职场，觉得一切都很新鲜，导师给的任务也不多（要是每天都是这样就好了），于是开始带薪学习。（学习视频分享：vuejs教程）
做啥好呢
没事在网上乱逛的时候，偶然间看到一个动画效果不错，就决定上手做一些，简单的说就是一个完整的图片，在一段时间之后回突然破裂开来，觉得很有意思，就新建了一个文件夹。
出现问题
一下午的摸鱼时光，间公司熙熙攘攘，我在其中却格格不入（太闲了），不知多少人投来质疑的眼光（这家伙不工作吗），但我只沉浸在我的代码里。终于勉强完成了一个不怎么丑的版本。
立即学习“前端免费学习笔记（深入）”；
原理
图片破裂效果说白了就是搞了100个div，每个div都有自己的背景图片，通过backgroundPosition属性来控制每个div的背景图片方位，最后拼在一起，就像一张完整的图片一样，给每个div都加上动画效果，每个div的旋转角度不同，移动距离不同，移动方位不同来让整个图片像玻璃一样散开来。
HTML结构
这里用到了两个div，#break是用作为100个div的容器，#InBox是用来绑定下一张的背景图片
<div id="animateBox" v-show="showImg">
<div id="break"></div>
<div id="InBox"></div>
</div>准备5张图片
import bgImg5 from '../../assets/img/1/y1.png'
import bgImg4 from '../../assets/img/1/y2.png'
import bgImg3 from '../../assets/img/1/y3.png'
import bgImg2 from '../../assets/img/1/y4.png'
import bgImg6 from '../../assets/img/1/y5.png'
import { ref, onMounted, onUnmounted } from 'vue'
let index = 0
onMounted(() => {
let imageSrcArr = [bgImg2, bgImg3, bgImg4, bgImg5, bgImg6]
let imgloadPromiseArr: Array<Promise<HTMLImageElement>> = []
let imageArr: Array<string> = []
for (let i = 0; i < imageSrcArr.length; i++) {
imgloadPromiseArr[i] = new Promise((resolve, reject) => {
let img = new Image()
img.src = imageSrcArr[i]
img.onload = () => {
resolve(img)
}
})
}
imgloadPromiseArr.forEach(item => {
item.then(res => {
imageArr.push(`url(${(<HTMLImageElement>res).currentSrc})`)
index = imageArr.length
})
})
})创建div
通过createElement创建200个div，每个div绑定长宽，给div添加背景图片，使用backgroundPosition来让整个div变得像一张图片，给div绑定动画效果。
for (let i = 0; i < 100; i++) {
let div = document.createElement('div')
let div1 = document.createElement('div')
div.style.width = '76px'
div.style.height = '41px' // 这里为什么是41px后面会提到
div1.style.width = '76px'
div1.style.height = '40px'
div1.style.overflow = 'hidden'
div.style.boxSizing = 'border-box'
div.style.backgroundImage = imageArr[0]
let positionX = -(i % 10) * 76 + 'px'
let positionY = -Math.floor(i / 10) * 40 + 'px'
div.style.backgroundPosition = positionX + ' ' + positionY
div.style.backgroundSize = '760px 400px'
let style = document.styleSheets[0]
style.insertRule(`@keyframes secondrotate${i}
{
0%,30%{
transform:scale(1)
}
70%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
100%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
}`)
style.insertRule(`@keyframes secondrotateS${i}
{
0%,32%{
transform:scale(1);opacity:1;
}70%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
100%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
}`)
div1.style.animation = `secondrotateS${i} 4.5s ease-out infinite`
div.style.animation = `secondrotate${i} 4.5s ease-out infinite`
div.style.transformOrigin = `center center`
div1.appendChild(div)
dom.appendChild(div1)
}切换背景图片
通过zIndex来让当前展示的div是哪一个
前面说过，InBox是展示的下一张图片，在breakBox散落完成之后，让breakBox的zIndex降低，展示出下一张图片，随后带有100个div的breakBox完成下一张图片的渲染，zIndex提高，展示出来
let count = 0
let repeat = true
let breakBox: HTMLDivElement = document.querySelector('#break')!
let InBox: HTMLDivElement = document.querySelector('#InBox')!
function changeImage(InBox: HTMLDivElement) {
if (repeat) {
breakBox.style.zIndex = '-10'
count++
count = count === index ? 0 : count
repeat = false
setTimeout(() => {
repeat = true
breakBox.style.zIndex = '100'
let currentImageLength = count === index - 1 ? 0 : count + 1
InBox.style.backgroundImage = imageArr[currentImageLength]
}, 1000)
}
}每次动画完成之后会去调上面这个方法，为了能在div碎片破碎完毕，展示下一张图片，使用定时器将该方法进行延迟处理 4s是因为div碎片在4s后完全消失。（动画在运行70%的时候，透明度为0）
const timer1 = ref<number>()
const timer2 = ref<number>()
for (let i = 0; i < 100; i++) {
let div = document.createElement('div')
let div1 = document.createElement('div')
div.style.width = '76px'
div.style.height = '41px'
div1.style.width = '76px'
div1.style.height = '40px'
div1.style.overflow = 'hidden'
div.style.boxSizing = 'border-box'
div.style.backgroundImage = imageArr[0]
let positionX = -(i % 10) * 76 + 'px'
let positionY = -Math.floor(i / 10) * 40 + 'px'
div.style.backgroundPosition = positionX + ' ' + positionY
div.style.backgroundSize = '760px 400px'
let style = document.styleSheets[0]
style.insertRule(`@keyframes secondrotate${i}
{
0%,30%{
transform:scale(1)
}
70%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
100%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
}`)
style.insertRule(`@keyframes secondrotateS${i}
{
0%,32%{
transform:scale(1);opacity:1;
}70%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
100%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
}`)
div1.style.animation = `secondrotateS${i} 4.5s ease-out infinite`
div.style.animation = `secondrotate${i} 4.5s ease-out infinite`
div.style.transformOrigin = `center center`
div.addEventListener('animationstart', () => {
timer1.value = setTimeout(() => {
changeImage(InBox)
div.style.backgroundImage = imageArr[count]
}, 4000)
})
div.addEventListener('animationiteration', () => {
timer2.value = setTimeout(() => {
changeImage(InBox)
div.style.backgroundImage = imageArr[count]
}, 4000)
})
div1.appendChild(div)
dom.appendChild(div1)
}div存在间隙的问题
在100个div展示之后会出现这样的线，在经过多次尝试之后，找到了方法，将div的高度变大，div1设置overflow:hidden; 线回消失
代码详情
<template>
<div>
<transition name="fadeIn">
<div id="animateBox" v-show="showImg">
<div id="break"></div>
<div id="InBox"></div>
</div>
</transition>
</div>
</template>
<script setup>
import bgImg5 from '../../assets/img/1/y1.png'
import bgImg4 from '../../assets/img/1/y2.png'
import bgImg3 from '../../assets/img/1/y3.png'
import bgImg2 from '../../assets/img/1/y4.png'
import bgImg6 from '../../assets/img/1/y5.png'
import { ref, onMounted, onUnmounted } from 'vue'
const timer1 = ref<number>()
const timer2 = ref<number>()
const showImg = ref<boolean>(false)
onMounted(() => {
let imageSrcArr = [bgImg2, bgImg3, bgImg4, bgImg5, bgImg6]
let imgloadPromiseArr: Array<Promise<HTMLImageElement>> = []
let imageArr: Array<string> = []
for (let i = 0; i < imageSrcArr.length; i++) {
imgloadPromiseArr[i] = new Promise((resolve, reject) => {
let img = new Image()
img.src = imageSrcArr[i]
img.onload = () => {
resolve(img)
}
})
}
imgloadPromiseArr.forEach(item => {
item.then(res => {
imageArr.push(`url(${(<HTMLImageElement>res).currentSrc})`)
index = imageArr.length
})
})
showImg.value = true
let repeat = true
function changeImage(InBox: HTMLDivElement) {
if (repeat) {
breakBox.style.zIndex = '-10'
count++
count = count === index ? 0 : count
repeat = false
setTimeout(() => {
repeat = true
breakBox.style.zIndex = '100'
let currentImageLength = count === index - 1 ? 0 : count + 1
InBox.style.backgroundImage = imageArr[currentImageLength]
}, 1000)
}
}
let count = 0
let index = 0
let breakBox: HTMLDivElement = document.querySelector('#break')!
let InBox: HTMLDivElement = document.querySelector('#InBox')!
InBox.style.backgroundImage = imageArr[1]
const appendDom = (dom: HTMLElement) => {
for (let i = 0; i < 100; i++) {
let div = document.createElement('div')
let div1 = document.createElement('div')
div.style.width = '76px'
div.style.height = '41px'
div1.style.width = '76px'
div1.style.height = '40px'
div1.style.overflow = 'hidden'
div.style.boxSizing = 'border-box'
div.style.backgroundImage = imageArr[0]
let positionX = -(i % 10) * 76 + 'px'
let positionY = -Math.floor(i / 10) * 40 + 'px'
div.style.backgroundPosition = positionX + ' ' + positionY
div.style.backgroundSize = '760px 400px'
let style = document.styleSheets[0]
style.insertRule(`@keyframes secondrotate${i}
{
0%,30%{
transform:scale(1)
}
70%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
100%
{transform: rotateX(${180 + Math.random() * 720}deg) rotateY(${180 + Math.random() * 720}deg)}
}`)
style.insertRule(`@keyframes secondrotateS${i}
{
0%,32%{
transform:scale(1);opacity:1;
}70%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
100%
{transform: translateZ(${300 + Math.random() * 1500}px) translate(${(0.5 - Math.random()) * 500}px,${
(0.5 - Math.random()) * 500
}px);opacity:0}
}`)
div1.style.animation = `secondrotateS${i} 4.5s ease-out infinite`
div.style.animation = `secondrotate${i} 4.5s ease-out infinite`
div.style.transformOrigin = `center center`
div.addEventListener('animationstart', () => {
timer1.value = setTimeout(() => {
changeImage(InBox)
div.style.backgroundImage = imageArr[count]
}, 4000)
})
div.addEventListener('animationiteration', () => {
timer2.value = setTimeout(() => {
changeImage(InBox)
div.style.backgroundImage = imageArr[count]
}, 4000)
})
div1.appendChild(div)
dom.appendChild(div1)
}
}
appendDom(breakBox)
})
onUnmounted(() => {
typeof timer1 === 'number' && clearTimeout(timer1)
typeof timer2 === 'number' && clearTimeout(timer2)
})
</script>
<style scoped>
@import url('../../css/comment/animate.css');
#animateBox {
width: 100vw;
height: calc(100vh - 50px);
// background-color: rgba(255, 255, 255, 0.6);
#break {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
margin: auto;
width: 760px;
height: 400px;
display: flex;
perspective: 1000px;
transform-style: preserve-3d;
flex-wrap: wrap;
z-index: 100;
}
#InBox {
position: absolute;
left: 0;
top: 0;
right: 0;
bottom: 0;
margin: auto;
width: 760px;
height: 400px;
display: flex;
perspective: 1000px;
transform-style: preserve-3d;
flex-wrap: wrap;
z-index: 10;
background-size: 760px 400px;
}
}
</style> 
