基于Vue3实现的图片散落效果实例

目录

• 背景
• 做啥好呢
• 出现问题
• 原理
• HTML结构
• 准备5张图片
• 创建div
• 切换背景图片
• div存在间隙的问题
• 代码详情
• 总结

背景

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。

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。

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 lang="ts">
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 lang="scss">
@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>

总结

到此这篇关于基于Vue3实现的图片散落效果的文章就介绍到这了,更多相关Vue3图片散落内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们！