vue实现图片拖拽及鼠标滚轮放大缩小的示例代码
作者:南风number
本文主要给大家介绍如何vue实现图片拖拽及鼠标滚轮放大缩小,文中有详细的代码供大家参考,对我们的学习或工作有一定的帮助,需要的朋友可以参考下
效果:
代码实现
<template> <div class="container"> <div class="image-container" @mousewheel.stop="onMouseWheel" @mousedown="onMouseDown" @mousemove="onMouseMove" @mouseleave="onMouseLeave" @mouseup="onMouseUp" > <img :src="imageSrc" :style="{ transform: imageTransform }" ref="image" /> </div> </div> </template> <script> export default { data() { return { imageSrc: "https://img1.baidu.com/it/u=3065838285,2676115581&fm=253&app=138&size=w931&n=0&f=JPEG&fmt=auto?sec=1690995600&t=33317e67c6570c9f6d7cdfd53ee8db57", scale: 1, isDragging: false, dragStartX: 0, dragStartY: 0, imageLeft: 0, imageTop: 0, }; }, computed: { imageTransform() { return `translate(${this.imageLeft}px, ${this.imageTop}px) scale(${this.scale})`; }, }, methods: { onMouseWheel(event) { event.preventDefault(); const wheelDelta = event.deltaY; if (wheelDelta > 0 && this.scale > 0.4) { this.scale -= 0.1; } else if (wheelDelta < 0) { this.scale += 0.1; } }, onMouseDown(event) { this.isDragging = true; this.dragStartX = event.clientX; this.dragStartY = event.clientY; this.startImageX = this.imageLeft; this.startImageY = this.imageTop; }, onMouseMove(event) { event.preventDefault(); if (this.isDragging) { const offsetX = event.clientX - this.dragStartX; const offsetY = event.clientY - this.dragStartY; this.imageLeft = this.startImageX + offsetX; this.imageTop = this.startImageY + offsetY; } }, onMouseUp() { this.isDragging = false; }, onMouseLeave() { this.isDragging = false; }, }, }; </script> <style scoped> .container { position: relative; width: 500px; height: 500px; border: 1px solid #ccc; overflow: hidden; } .image-container { position: absolute; top: 0; left: 0; display: flex; justify-content: center; align-items: center; width: 100%; height: 100%; } img { max-width: 100%; max-height: 100%; } </style>
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