本图片预览组件主要包括以下功能：
-
展示图片时，可设置鼠标悬浮时的预览文本；图像无法加载时要显示的描述；自定义图像高度和宽度；设置图像如何适应容器高度和宽度（ fill(填充) | contain(等比缩放包含) | cover(等比缩放覆盖)）；传入单张图像或图像数组；设置图像缩放比率；设置最大最小缩放比例；
-
单张图片预览时，左上角展示图片名称：水平镜像或垂直镜像；可顺时针旋转或逆时针旋转；还原图片；放大缩小；鼠标任意拖动；鼠标双击图片还原；使用触摸板或鼠标滚轮控制图片缩放；
-
多张图片预览时，除了单张展示的功能以外：可点击左右切换按钮预览多张图片；使用键盘上下左右按键进行图片切换；设置是否可以循环切换图片；
可自定义设置以下属性：
-
图像地址 | 图像地址数组（src），类型：string | Array<{src: string, alt?: string}>，默认 ”
-
图像无法加载时显示的描述（alt），类型：string，默认 ‘image’
-
图像宽度（width），类型：string | number，单位px，默认 300
-
图像高度（height），类型：string | number，默认 ‘100%’
-
是否显示边框（bordered），类型：boolean，默认 true
-
展示图片间距大小，数组时表示: [水平间距, 垂直间距]（gap），类型：number|number[]，默认 8px
-
图形如何适应容器高度和宽度（fit），类型：’contain’|’fill’|’cover’，默认’contain’，可选 fill(填充)、contain(等比缩放包含)、cover(等比缩放覆盖)
-
预览文本（preview），类型：string | slot，默认 ‘预览’
-
每次缩放比率（zoomRatio），类型：number，默认 0.1
-
最小缩放比例（minZoomScale），类型：number，默认 0.1
-
最大缩放比例（maxZoomScale），类型：number，默认 10
-
缩放移动旋转图片后，是否可以双击还原（resetOnDbclick），类型：boolean，默认 true
-
是否可以循环切换图片（loop），类型：boolean，默认 false
-
相册模式，即从一张展示图片点开相册（album），类型：boolean，默认 false
效果如下图：
在线预览
预览时样式：
正常展示时样式：
图片加载时样式：
鼠标悬浮时样式：
其中引入组件：
Vue3加载中（Spin）
、
Vue3间距（Space）
①创建图片预览组件Image.vue：
<script setup lang="ts">
import { computed, ref, onMounted, onUnmounted, watchEffect } from 'vue'
import Spin from '../spin'
import Space from '../space'
interface Image {
src: string // 图像地址
name?: string // 图像名称
}
interface Props {
src: string|Image[] // 图像地址 | 图像地址数组
name?: string // 图像名称，没有传入图片名时自动从图像地址src中读取
width?: string|number // 图像宽度
height?: string|number // 图像高度
bordered?: boolean // 是否显示边框
gap?: number|number[] // 展示图片间距大小，数组时表示: [水平间距, 垂直间距]
fit?: 'contain'|'fill'|'cover' // 图像如何适应容器高度和宽度
preview?: string // 预览文本 string | slot
zoomRatio?: number // 每次缩放比率
minZoomScale?: number // 最小缩放比例
maxZoomScale?: number // 最大缩放比例
resetOnDbclick?: boolean // 缩放移动旋转图片后，是否可以双击还原
loop?: boolean // 是否可以循环切换图片
album?: boolean // 是否相册模式，即从一张展示图片点开相册
}
const props = withDefaults(defineProps<Props>(), {
src: '',
name: '',
width: 200,
height: 200,
bordered: true,
gap: 8,
fit: 'contain', // 可选 fill(填充) | contain(等比缩放包含) | cover(等比缩放覆盖)
preview: '预览',
zoomRatio: 0.1,
minZoomScale: 0.1,
maxZoomScale: 10,
resetOnDbclick: true,
loop: false,
album: false
})
const imageWidth = computed(() => {
if (typeof props.width === 'number') {
return props.width + 'px'
} else {
return props.width
}
})
const imageHeight = computed(() => {
if (typeof props.height === 'number') {
return props.height + 'px'
} else {
return props.height
}
})
const images = ref<Image[]>([])
watchEffect(() => {
images.value = getImages()
})
function getImages () {
if (Array.isArray(props.src)) {
return props.src
} else {
return [{
src: props.src,
name: props.name
}]
}
}
const imageCount = computed(() => {
return images.value.length
})
onMounted(() => {
// 监听键盘切换事件
document.addEventListener('keydown', keyboardSwitch)
})
onUnmounted(() => {
// 移除键盘切换事件
document.removeEventListener('keydown', keyboardSwitch)
})
const complete = ref(Array(imageCount.value).fill(false)) // 图片是否加载完成
const loaded = ref(Array(imageCount.value).fill(false)) // 预览图片是否加载完成
const previewIndex = ref(0) // 当前预览的图片索引
const showPreview = ref(false) // 是否显示预览
const rotate = ref(0) // 预览图片旋转角度
const scale = ref(1) // 缩放比例
const swapX = ref(1) // 水平镜像数值符号
const swapY = ref(1) // 垂直镜像数值符号
const sourceX = ref(0) // 拖动开始时位置
const sourceY = ref(0) // 拖动开始时位置
const dragX = ref(0) // 拖动横向距离
const dragY = ref(0) // 拖动纵向距离
function keyboardSwitch (e: KeyboardEvent) {
e.preventDefault()
if (showPreview.value && imageCount.value > 1) {
if (e.key === 'ArrowLeft' || e.key === 'ArrowUp') {
onSwitchLeft()
}
if (e.key === 'ArrowRight' || e.key === 'ArrowDown') {
onSwitchRight()
}
}
}
function onComplete (n: number) { // 图片加载完成
complete.value[n] = true
}
function onLoaded (index: number) { // 预览图片加载完成
loaded.value[index] = true
}
function getImageName (image: Image) { // 从图像地址src中获取图像名称
if (image) {
if (image.name) {
return image.name
} else {
const res = image.src.split('?')[0].split('/')
return res[res.length - 1]
}
}
}
function onPreview (n: number) {
scale.value = 1
rotate.value = 0
dragX.value = 0
dragY.value = 0
showPreview.value = true
previewIndex.value = n
}
defineExpose({
onPreview
})
// 消除js加减精度问题的加法函数
function add (num1: number, num2: number) {
const num1DeciStr = String(num1).split('.')[1]
const num2DeciStr = String(num2).split('.')[1]
let maxLen = Math.max(num1DeciStr?.length || 0, num2DeciStr?.length || 0) // 两数中最长的小数位长度
let num1Str = num1.toFixed(maxLen) // 补零，返回字符串
let num2Str = num2.toFixed(maxLen)
const result = +(num1Str.replace('.', '')) + +(num2Str.replace('.', '')) // 转换为整数相加
return result / Math.pow(10, maxLen)
}
function onClose () { // 关闭
showPreview.value = false
}
function onZoomin () { // 放大
if (scale.value + props.zoomRatio > props.maxZoomScale) {
scale.value = props.maxZoomScale
} else {
scale.value = add(scale.value, props.zoomRatio)
}
}
function onZoomout () { // 缩小
if (scale.value - props.zoomRatio < props.minZoomScale) {
scale.value = props.minZoomScale
} else {
scale.value = add(scale.value, -props.zoomRatio)
}
}
function onResetOrigin () { // 重置图片为初始状态
scale.value = 1
swapX.value = 1
swapY.value = 1
rotate.value = 0
dragX.value = 0
dragY.value = 0
}
function onClockwiseRotate () { // 顺时针旋转
rotate.value += 90
}
function onAnticlockwiseRotate () { // 逆时针旋转
rotate.value -= 90
}
function onHorizontalMirror () {
swapX.value *= -1
}
function onVerticalMirror () {
swapY.value *= -1
}
function onWheel (e: WheelEvent) { // 鼠标滚轮缩放
// e.preventDefault() // 禁止浏览器捕获滑动事件
console.log('e', e)
const scrollZoom = e.deltaY * props.zoomRatio * 0.1 // 滚轮的纵向滚动量
if (scale.value === props.minZoomScale && scrollZoom > 0) {
return
}
if (scale.value === props.maxZoomScale && scrollZoom < 0) {
return
}
if (scale.value - scrollZoom < props.minZoomScale) {
scale.value = props.minZoomScale
} else if (scale.value - scrollZoom > props.maxZoomScale) {
scale.value = props.maxZoomScale
} else {
scale.value = add(scale.value, -scrollZoom)
}
}
function onMouseDown (event: MouseEvent) {
// event.preventDefault() // 消除拖动元素时的阴影
const el = event.target // 当前点击的元素
const imageRect = (el as Element).getBoundingClientRect()
const top = imageRect.top // 图片上边缘距浏览器窗口上边界的距离
const bottom = imageRect.bottom // 图片下边缘距浏览器窗口上边界的距离
const right = imageRect.right // 图片右边缘距浏览器窗口左边界的距离
const left = imageRect.left // 图片左边缘距浏览器窗口左边界的距离
const viewportWidth = document.documentElement.clientWidth
const viewportHeight = document.documentElement.clientHeight
sourceX.value = event.clientX // 鼠标按下时相对于视口左边缘的X坐标
sourceY.value = event.clientY // 鼠标按下时相对于视口上边缘的Y坐标
const sourceDragX = dragX.value // 鼠标按下时图片的X轴偏移量
const sourceDragY = dragY.value // 鼠标按下时图片的Y轴偏移量
document.onmousemove = (e: MouseEvent) => {
// e.clientX返回事件被触发时鼠标指针相对于浏览器可视窗口的水平坐标
dragX.value = sourceDragX + e.clientX - sourceX.value
dragY.value = sourceDragY + e.clientY - sourceY.value
}
document.onmouseup = () => {
if (dragX.value > sourceDragX + viewportWidth - right) { // 溢出视口右边缘
dragX.value = sourceDragX + viewportWidth - right
}
if (dragX.value < sourceDragX - left) { // 溢出视口左边缘
dragX.value = sourceDragX - left
}
if (dragY.value > sourceDragY + viewportHeight - bottom) { // 溢出视口下边缘
dragY.value = sourceDragY + viewportHeight - bottom
}
if (dragY.value < sourceDragY - top) { // 溢出视口上边缘
dragY.value = sourceDragY - top
}
document.onmousemove = null
}
}
function onSwitchLeft () {
if (props.loop) {
previewIndex.value = (previewIndex.value - 1 + imageCount.value) % imageCount.value
} else {
if (previewIndex.value > 0) {
previewIndex.value--
}
}
onResetOrigin()
}
function onSwitchRight () {
if (props.loop) {
previewIndex.value = (previewIndex.value + 1) % imageCount.value
} else {
if (previewIndex.value < imageCount.value - 1) {
previewIndex.value++
}
}
onResetOrigin()
}
</script>
<template>
<div class="m-image-wrap">
<Space :size="gap">
<div
class="m-image"
:class="{bordered: bordered, 'image-hover-mask': complete[index]}"
:style="`width: ${imageWidth}; height: ${imageHeight};`"
v-for="(image, index) in images" :key="index"
v-show="!album || (album && index === 0)">
<Spin :spinning="!complete[index]" indicator="dynamic-circle">
<img class="u-image" :style="`width: calc(${imageWidth} - 2px); height: calc(${imageHeight} - 2px); object-fit: ${fit};`" @load="onComplete(index)" :src="image.src" :alt="image.name" />
</Spin>
<div class="m-image-mask" @click="onPreview(index)">
<div class="m-image-mask-info">
<svg class="u-eye" focusable="false" data-icon="eye" aria-hidden="true" viewBox="64 64 896 896"><path d="M942.2 486.2C847.4 286.5 704.1 186 512 186c-192.2 0-335.4 100.5-430.2 300.3a60.3 60.3 0 000 51.5C176.6 737.5 319.9 838 512 838c192.2 0 335.4-100.5 430.2-300.3 7.7-16.2 7.7-35 0-51.5zM512 766c-161.3 0-279.4-81.8-362.7-254C232.6 339.8 350.7 258 512 258c161.3 0 279.4 81.8 362.7 254C791.5 684.2 673.4 766 512 766zm-4-430c-97.2 0-176 78.8-176 176s78.8 176 176 176 176-78.8 176-176-78.8-176-176-176zm0 288c-61.9 0-112-50.1-112-112s50.1-112 112-112 112 50.1 112 112-50.1 112-112 112z"></path></svg>
<p class="u-pre">
<slot name="preview">{{ preview }}</slot>
</p>
</div>
</div>
</div>
</Space>
<Transition name="mask">
<div class="m-preview-mask" v-show="showPreview"></div>
</Transition>
<Transition name="preview">
<div class="m-preview-wrap" v-show="showPreview" @click.self="onClose" @wheel.prevent="onWheel">
<div class="m-preview-body">
<div class="m-preview-operations">
<a class="u-name" :href="images[previewIndex].src" target="_blank" :title="getImageName(images[previewIndex])">{{ getImageName(images[previewIndex]) }}</a>
<p class="u-preview-progress" v-show="Array.isArray(src)">{{ (previewIndex + 1) }} / {{ imageCount }}</p>
<div class="u-preview-operation" title="关闭" @click="onClose">
<svg class="u-icon" focusable="false" data-icon="close" aria-hidden="true" viewBox="64 64 896 896"><path d="M563.8 512l262.5-312.9c4.4-5.2.7-13.1-6.1-13.1h-79.8c-4.7 0-9.2 2.1-12.3 5.7L511.6 449.8 295.1 191.7c-3-3.6-7.5-5.7-12.3-5.7H203c-6.8 0-10.5 7.9-6.1 13.1L459.4 512 196.9 824.9A7.95 7.95 0 00203 838h79.8c4.7 0 9.2-2.1 12.3-5.7l216.5-258.1 216.5 258.1c3 3.6 7.5 5.7 12.3 5.7h79.8c6.8 0 10.5-7.9 6.1-13.1L563.8 512z"></path></svg>
</div>
<div class="u-preview-operation" title="放大" :class="{'u-operation-disabled': scale === maxZoomScale}" @click="onZoomin">
<svg class="u-icon" focusable="false" data-icon="zoom-in" aria-hidden="true" viewBox="64 64 896 896"><path d="M637 443H519V309c0-4.4-3.6-8-8-8h-60c-4.4 0-8 3.6-8 8v134H325c-4.4 0-8 3.6-8 8v60c0 4.4 3.6 8 8 8h118v134c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V519h118c4.4 0 8-3.6 8-8v-60c0-4.4-3.6-8-8-8zm284 424L775 721c122.1-148.9 113.6-369.5-26-509-148-148.1-388.4-148.1-537 0-148.1 148.6-148.1 389 0 537 139.5 139.6 360.1 148.1 509 26l146 146c3.2 2.8 8.3 2.8 11 0l43-43c2.8-2.7 2.8-7.8 0-11zM696 696c-118.8 118.7-311.2 118.7-430 0-118.7-118.8-118.7-311.2 0-430 118.8-118.7 311.2-118.7 430 0 118.7 118.8 118.7 311.2 0 430z"></path></svg>
</div>
<div class="u-preview-operation" title="缩小" :class="{'u-operation-disabled': scale === minZoomScale}" @click="onZoomout">
<svg class="u-icon" focusable="false" data-icon="zoom-out" aria-hidden="true" viewBox="64 64 896 896"><path d="M637 443H325c-4.4 0-8 3.6-8 8v60c0 4.4 3.6 8 8 8h312c4.4 0 8-3.6 8-8v-60c0-4.4-3.6-8-8-8zm284 424L775 721c122.1-148.9 113.6-369.5-26-509-148-148.1-388.4-148.1-537 0-148.1 148.6-148.1 389 0 537 139.5 139.6 360.1 148.1 509 26l146 146c3.2 2.8 8.3 2.8 11 0l43-43c2.8-2.7 2.8-7.8 0-11zM696 696c-118.8 118.7-311.2 118.7-430 0-118.7-118.8-118.7-311.2 0-430 118.8-118.7 311.2-118.7 430 0 118.7 118.8 118.7 311.2 0 430z"></path></svg>
</div>
<div class="u-preview-operation" title="还原" @click="onResetOrigin">
<svg class="u-icon" focusable="false" data-icon="expand" aria-hidden="true" viewBox="64 64 896 896"><path d="M342 88H120c-17.7 0-32 14.3-32 32v224c0 8.8 7.2 16 16 16h48c8.8 0 16-7.2 16-16V168h174c8.8 0 16-7.2 16-16v-48c0-8.8-7.2-16-16-16zm578 576h-48c-8.8 0-16 7.2-16 16v176H682c-8.8 0-16 7.2-16 16v48c0 8.8 7.2 16 16 16h222c17.7 0 32-14.3 32-32V680c0-8.8-7.2-16-16-16zM342 856H168V680c0-8.8-7.2-16-16-16h-48c-8.8 0-16 7.2-16 16v224c0 17.7 14.3 32 32 32h222c8.8 0 16-7.2 16-16v-48c0-8.8-7.2-16-16-16zM904 88H682c-8.8 0-16 7.2-16 16v48c0 8.8 7.2 16 16 16h174v176c0 8.8 7.2 16 16 16h48c8.8 0 16-7.2 16-16V120c0-17.7-14.3-32-32-32z"></path></svg>
</div>
<div class="u-preview-operation" title="向右旋转" @click="onClockwiseRotate">
<svg class="u-icon" focusable="false" data-icon="rotate-right" aria-hidden="true" viewBox="64 64 896 896"><path d="M480.5 251.2c13-1.6 25.9-2.4 38.8-2.5v63.9c0 6.5 7.5 10.1 12.6 6.1L660 217.6c4-3.2 4-9.2 0-12.3l-128-101c-5.1-4-12.6-.4-12.6 6.1l-.2 64c-118.6.5-235.8 53.4-314.6 154.2A399.75 399.75 0 00123.5 631h74.9c-.9-5.3-1.7-10.7-2.4-16.1-5.1-42.1-2.1-84.1 8.9-124.8 11.4-42.2 31-81.1 58.1-115.8 27.2-34.7 60.3-63.2 98.4-84.3 37-20.6 76.9-33.6 119.1-38.8z"></path><path d="M880 418H352c-17.7 0-32 14.3-32 32v414c0 17.7 14.3 32 32 32h528c17.7 0 32-14.3 32-32V450c0-17.7-14.3-32-32-32zm-44 402H396V494h440v326z"></path></svg>
</div>
<div class="u-preview-operation" title="向左旋转" @click="onAnticlockwiseRotate">
<svg class="u-icon" focusable="false" data-icon="rotate-left" aria-hidden="true" viewBox="64 64 896 896"><path d="M672 418H144c-17.7 0-32 14.3-32 32v414c0 17.7 14.3 32 32 32h528c17.7 0 32-14.3 32-32V450c0-17.7-14.3-32-32-32zm-44 402H188V494h440v326z"></path><path d="M819.3 328.5c-78.8-100.7-196-153.6-314.6-154.2l-.2-64c0-6.5-7.6-10.1-12.6-6.1l-128 101c-4 3.1-3.9 9.1 0 12.3L492 318.6c5.1 4 12.7.4 12.6-6.1v-63.9c12.9.1 25.9.9 38.8 2.5 42.1 5.2 82.1 18.2 119 38.7 38.1 21.2 71.2 49.7 98.4 84.3 27.1 34.7 46.7 73.7 58.1 115.8a325.95 325.95 0 016.5 140.9h74.9c14.8-103.6-11.3-213-81-302.3z"></path></svg>
</div>
<div class="u-preview-operation" title="水平镜像" @click="onHorizontalMirror">
<svg class="u-icon" focusable="false" data-icon="swap" aria-hidden="true" viewBox="64 64 896 896"><path d="M847.9 592H152c-4.4 0-8 3.6-8 8v60c0 4.4 3.6 8 8 8h605.2L612.9 851c-4.1 5.2-.4 13 6.3 13h72.5c4.9 0 9.5-2.2 12.6-6.1l168.8-214.1c16.5-21 1.6-51.8-25.2-51.8zM872 356H266.8l144.3-183c4.1-5.2.4-13-6.3-13h-72.5c-4.9 0-9.5 2.2-12.6 6.1L150.9 380.2c-16.5 21-1.6 51.8 25.1 51.8h696c4.4 0 8-3.6 8-8v-60c0-4.4-3.6-8-8-8z"></path></svg>
</div>
<div class="u-preview-operation" title="垂直镜像" @click="onVerticalMirror">
<svg class="u-icon" style="transform: rotate(90deg);" focusable="false" data-icon="swap" aria-hidden="true" viewBox="64 64 896 896"><path d="M847.9 592H152c-4.4 0-8 3.6-8 8v60c0 4.4 3.6 8 8 8h605.2L612.9 851c-4.1 5.2-.4 13 6.3 13h72.5c4.9 0 9.5-2.2 12.6-6.1l168.8-214.1c16.5-21 1.6-51.8-25.2-51.8zM872 356H266.8l144.3-183c4.1-5.2.4-13-6.3-13h-72.5c-4.9 0-9.5 2.2-12.6 6.1L150.9 380.2c-16.5 21-1.6 51.8 25.1 51.8h696c4.4 0 8-3.6 8-8v-60c0-4.4-3.6-8-8-8z"></path></svg>
</div>
</div>
<div
class="m-preview-image"
:style="`transform: translate3d(${dragX}px, ${dragY}px, 0px);`">
<Spin
:spinning="!loaded[index]"
indicator="dynamic-circle"
v-show="previewIndex === index"
v-for="(image, index) in images" :key="index">
<img
class="u-preview-image"
:style="`transform: scale3d(${swapX * scale}, ${swapY * scale}, 1) rotate(${rotate}deg);`"
:src="image.src"
:alt="image.name"
@mousedown.prevent="onMouseDown($event)"
@load="onLoaded(index)"
@dblclick="resetOnDbclick ? onResetOrigin() : () => false"/>
</Spin>
</div>
<template v-if="imageCount > 1">
<div
class="m-switch-left"
:class="{'u-switch-disabled': previewIndex === 0 && !loop}"
@click="onSwitchLeft">
<svg focusable="false" class="u-switch" data-icon="left" aria-hidden="true" viewBox="64 64 896 896"><path d="M724 218.3V141c0-6.7-7.7-10.4-12.9-6.3L260.3 486.8a31.86 31.86 0 000 50.3l450.8 352.1c5.3 4.1 12.9.4 12.9-6.3v-77.3c0-4.9-2.3-9.6-6.1-12.6l-360-281 360-281.1c3.8-3 6.1-7.7 6.1-12.6z"></path></svg>
</div>
<div
class="m-switch-right"
:class="{'u-switch-disabled': previewIndex === imageCount - 1 && !loop}"
@click="onSwitchRight">
<svg focusable="false" class="u-switch" data-icon="right" aria-hidden="true" viewBox="64 64 896 896"><path d="M765.7 486.8L314.9 134.7A7.97 7.97 0 00302 141v77.3c0 4.9 2.3 9.6 6.1 12.6l360 281.1-360 281.1c-3.9 3-6.1 7.7-6.1 12.6V883c0 6.7 7.7 10.4 12.9 6.3l450.8-352.1a31.96 31.96 0 000-50.4z"></path></svg>
</div>
</template>
</div>
</div>
</Transition>
</div>
</template>
<style lang="less" scoped>
.mask-enter-active, .mask-leave-active {
transition: opacity .25s ease-in-out;
}
.mask-enter-from, .mask-leave-to {
opacity: 0;
}
.preview-enter-active, .preview-leave-active {
transition: all .25s ease-in-out;
}
.preview-enter-from, .preview-leave-to {
opacity: 0;
transform: scale(.01);
}
.m-image-wrap {
display: inline-block;
.image-hover-mask {
&:hover {
.m-image-mask {
opacity: 1;
pointer-events: auto;
}
}
}
.bordered {
border: 1px solid #d9d9d9;
}
.m-image {
position: relative;
display: inline-block;
vertical-align: top;
border-radius: 8px;
overflow: hidden;
.u-image {
display: inline-block;
width: 100%;
height: 100%;
vertical-align: middle;
}
.m-image-mask {
// top right bottom left 简写为 inset: 0
// insert 无论元素的书写模式、行内方向和文本朝向如何，其所定义的都不是逻辑偏移而是实体偏移
position: absolute;
inset: 0;
display: flex;
align-items: center;
justify-content: center;
color: #fff;
background: rgba(0, 0, 0, .5);
cursor: pointer;
opacity: 0;
pointer-events: none;
transition: opacity .3s;
.m-image-mask-info {
overflow: hidden;
white-space: nowrap;
text-overflow: ellipsis;
padding: 0 4px;
.u-eye {
display: inline-flex;
align-items: center;
margin-right: 4px;
vertical-align: -.125em;
width: 14px;
height: 14px;
fill: #FFF;
}
.u-pre {
display: inline-block;
}
}
}
}
.m-preview-mask {
position: fixed;
inset: 0;
z-index: 1000;
height: 100%;
background-color: rgba(0, 0, 0, .45);
}
.m-preview-wrap {
position: fixed;
top: 0;
left: 0;
bottom: 0;
right: 0;
overflow: auto;
outline: 0;
z-index: 1080;
height: 100%;
text-align: center;
.m-preview-body {
position: absolute;
inset: 0;
overflow: hidden;
pointer-events: none;
.m-preview-operations {
position: fixed;
width: 100%;
z-index: 9;
display: flex;
flex-direction: row-reverse;
align-items: center;
background: rgba(0, 0, 0, .1);
height: 42px;
pointer-events: auto;
.u-name {
position: absolute;
left: 12px;
font-size: 14px;
color: rgb(255, 255, 255);
line-height: 1.57;
max-width: calc(50% - 60px);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
transition: color .3s;
&:hover {
color: @themeColor;
}
}
.u-preview-progress {
position: absolute;
left: 50%;
transform: translateX(-50%);
font-size: 14px;
color: rgb(255, 255, 255);
line-height: 1.57;
}
.u-preview-operation {
line-height: 1;
padding: 12px;
cursor: pointer;
transition: all .3s;
&:not(:last-child) {
margin-left: 12px;
}
&:hover {
background: rgba(0,0,0,.25);
}
.u-icon {
display: inline-block;
width: 18px;
height: 18px;
vertical-align: bottom;
fill: #FFF;
}
}
.u-operation-disabled {
color: rgba(255, 255, 255, .25);
pointer-events: none;
.u-icon {
fill: rgba(255, 255, 255, .25);
}
}
}
.m-preview-image {
position: absolute;
z-index: 3;
inset: 0;
transition: transform .3s cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
display: flex;
justify-content: center;
align-items: center;
.u-preview-image {
display: inline-block;
vertical-align: middle;
max-width: 100%;
max-height: 100vh;
cursor: grab;
transition: transform .3s cubic-bezier(0.215, 0.61, 0.355, 1) 0s;
user-select: none;
pointer-events: auto;
}
}
.m-switch-left {
inset-inline-start: 12px;
position: fixed;
inset-block-start: 50%;
z-index: 1081;
display: flex;
align-items: center;
justify-content: center;
width: 40px;
height: 40px;
margin-top: -20px;
color: rgb(255, 255, 255);
background: rgba(0, 0, 0, .1);
border-radius: 50%;
transform: translateY(-50%);
cursor: pointer;
transition: all .3s;
pointer-events: auto;
&:hover {
background: rgba(0, 0, 0, .2);
}
.u-switch {
width: 18px;
height: 18px;
fill: #FFF;
}
}
.m-switch-right {
inset-inline-end: 12px;
position: fixed;
inset-block-start: 50%;
z-index: 1081;
display: flex;
align-items: center;
justify-content: center;
width: 40px;
height: 40px;
margin-top: -20px;
color: rgb(255, 255, 255);
background: rgba(0, 0, 0, .1);
border-radius: 50%;
transform: translateY(-50%);
cursor: pointer;
transition: all .3s;
pointer-events: auto;
&:hover {
background: rgba(0, 0, 0, .2);
}
.u-switch {
width: 18px;
height: 18px;
fill: #FFF;
}
}
.u-switch-disabled {
color: rgba(255, 255, 255, .25);
background: transparent;
cursor: not-allowed;
&:hover {
background: transparent;
}
.u-switch {
fill: rgba(255, 255, 255, .25);
}
}
}
}
}
</style>
②在要使用的页面引入：
<script setup lang="ts">
import Image from './Image.vue'
import { ref } from 'vue'
const images = ref([
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/1.jpg',
name: 'image-1.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/2.jpg',
name: 'image-2.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/3.jpg',
name: 'image-3.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/4.jpg',
name: 'image-4.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/5.jpg',
name: 'image-5.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/6.jpg',
name: 'image-6.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/7.jpg',
name: 'image-7.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/8.jpg',
name: 'image-8.jpg'
},
{
src: 'https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/9.jpg',
name: 'image-9.jpg'
}
])
setTimeout(() => {
}, 1000)
</script>
<template>
<div>
<h2 class="mb10">Image 图片基本使用</h2>
<Image src="https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/1.jpg" />
<h2 class="mt30 mb10">多张图片预览，同时支持键盘 (left / right / up / down) 按键切换 (src: images)</h2>
<Image :src="images" />
<h2 class="mt30 mb10">多张图片预览，支持循环切换图片 (loop: true)</h2>
<Image loop :src="images" />
<h2 class="mt30 mb10">多张图片预览，相册模式 (album: true)</h2>
<Image loop :src="images" album />
<h2 class="mt30 mb10">预览文本设为 preview 同时图片覆盖容器 (preview: preview & fit: cover)</h2>
<Image fit="cover" src="https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/1.jpg">
<template #preview>
<p class="u-pre">preview</p>
</template>
</Image>
<h2 class="mt30 mb10">更改缩放比率和最大最小缩放比例 (zoomRatio: 0.2 & minZoomScale: 0.5 & maxZoomScale: 2)</h2>
<Image
:width="400"
:height="300"
:zoomRatio="0.2"
:minZoomScale="0.5"
:maxZoomScale="2"
src="https://cdn.jsdelivr.net/gh/themusecatcher/resources@0.0.3/1.jpg" />
</div>
</template>
<style lang="less" scoped>
.u-pre {
display: inline-block;
font-size: 16px;
}
</style>
版权声明：本文为Dandrose原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。