基于Vue3怎么实现图片散落效果
这篇文章主要介绍"基于Vue3怎么实现图片散落效果",在日常操作中,相信很多人在基于Vue3怎么实现图片散落效果问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答"基于Vue3怎么实现图片散落效果"的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
效果图
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
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 = 0onMounted(() => { let imageSrcArr = [bgImg2, bgImg3, bgImg4, bgImg5, bgImg6] let imgloadPromiseArr: Array> = [] let imageArr: Array = [] 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(${( res).currentSrc})`) index = imageArr.length }) }) })
创建div
通过createElement创建200个div,每个div绑定长宽,给div添加背景图片,使用backgroundPosition来让整个div变得像一张图片,给div绑定动画效果。
for (let i = 0; i < 100; i++) { let div = document.createElement('div') let div1 = document.createElement('div') div.style.width = '76px' div.style.height = '41px' // 这里为什么是41px后面会提到 div1.style.width = '76px' div1.style.height = '40px' div1.style.overflow = 'hidden' div.style.boxSizing = 'border-box' div.style.backgroundImage = imageArr[0] let positionX = -(i % 10) * 76 + 'px' let positionY = -Math.floor(i / 10) * 40 + 'px' div.style.backgroundPosition = positionX + ' ' + positionY div.style.backgroundSize = '760px 400px' let style = document.styleSheets[0] style.insertRule(`@keyframes secondrotate${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${i} 4.5s ease-out infinite` div.style.transformOrigin = `center center` div1.appendChild(div) dom.appendChild(div1)}
切换背景图片
通过zIndex来让当前展示的div是哪一个
前面说过,InBox是展示的下一张图片,在breakBox散落完成之后,让breakBox的zIndex降低,展示出下一张图片,随后带有100个div的breakBox完成下一张图片的渲染,zIndex提高,展示出来
let count = 0 let repeat = true let breakBox: HTMLDivElement = document.querySelector('#break')! let InBox: HTMLDivElement = document.querySelector('#InBox')! function changeImage(InBox: HTMLDivElement) { if (repeat) { breakBox.style.zIndex = '-10' count++ count = count === index ? 0 : count repeat = false setTimeout(() => { repeat = true breakBox.style.zIndex = '100' let currentImageLength = count === index - 1 ? 0 : count + 1 InBox.style.backgroundImage = imageArr[currentImageLength] }, 1000) } }
每次动画完成之后会去调上面这个方法,为了能在div碎片破碎完毕,展示下一张图片,使用定时器将该方法进行延迟处理 4s是因为div碎片在4s后完全消失。(动画在运行70%的时候,透明度为0)
const timer1 = ref()const timer2 = ref ()for (let i = 0; i < 100; i++) { let div = document.createElement('div') let div1 = document.createElement('div') div.style.width = '76px' div.style.height = '41px' div1.style.width = '76px' div1.style.height = '40px' div1.style.overflow = 'hidden' div.style.boxSizing = 'border-box' div.style.backgroundImage = imageArr[0] let positionX = -(i % 10) * 76 + 'px' let positionY = -Math.floor(i / 10) * 40 + 'px' div.style.backgroundPosition = positionX + ' ' + positionY div.style.backgroundSize = '760px 400px' let style = document.styleSheets[0] style.insertRule(`@keyframes secondrotate${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
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